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commit b6f69c795547f59ddf1db17cddbd2b9a15c656ed upstream.
This reverts commit 645c08f17f477915f6d900b767e789852f150054
which was reported to break the build a program using this header.
The original issue was addressed in the alsa-lib side recently, so we
can make the header more self-contained again.
Reported-by: Dmitry V. Levin <ldv@altlinux.org>
Fixes: 645c08f17f47 ("ALSA: uapi: Drop asound.h inclusion from asoc.h")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200331090023.8112-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9b6eaaf3db5e5888df7bca7fed7752a90f7fd871 upstream.
The BIT() macro definition is not available for the UAPI headers
(moreover, it can be defined differently in the user space); replace
its usage with the _BITUL() macro that is defined in <linux/const.h>.
Fixes: 237483aa5cf4 ("coresight: stm: adding driver for CoreSight STM component")
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200324042213.GA10452@asgard.redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f400991bf872debffb01c46da882dc97d7e3248e upstream.
vt_dont_switch is pure boolean, no need for whole char.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200219073951.16151-6-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit dce05aa6eec977f1472abed95ccd71276b9a3864 upstream.
Avoid global variables (namely sel_cons) by introducing vc_is_sel. It
checks whether the parameter is the current selection console. This will
help putting sel_cons to a struct later.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200219073951.16151-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge vm fixes from Andrew Morton:
"5 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm/sparse: fix kernel crash with pfn_section_valid check
mm: fork: fix kernel_stack memcg stats for various stack implementations
hugetlb_cgroup: fix illegal access to memory
drivers/base/memory.c: indicate all memory blocks as removable
mm/swapfile.c: move inode_lock out of claim_swapfile
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Depending on CONFIG_VMAP_STACK and the THREAD_SIZE / PAGE_SIZE ratio the
space for task stacks can be allocated using __vmalloc_node_range(),
alloc_pages_node() and kmem_cache_alloc_node().
In the first and the second cases page->mem_cgroup pointer is set, but
in the third it's not: memcg membership of a slab page should be
determined using the memcg_from_slab_page() function, which looks at
page->slab_cache->memcg_params.memcg . In this case, using
mod_memcg_page_state() (as in account_kernel_stack()) is incorrect:
page->mem_cgroup pointer is NULL even for pages charged to a non-root
memory cgroup.
It can lead to kernel_stack per-memcg counters permanently showing 0 on
some architectures (depending on the configuration).
In order to fix it, let's introduce a mod_memcg_obj_state() helper,
which takes a pointer to a kernel object as a first argument, uses
mem_cgroup_from_obj() to get a RCU-protected memcg pointer and calls
mod_memcg_state(). It allows to handle all possible configurations
(CONFIG_VMAP_STACK and various THREAD_SIZE/PAGE_SIZE values) without
spilling any memcg/kmem specifics into fork.c .
Note: This is a special version of the patch created for stable
backports. It contains code from the following two patches:
- mm: memcg/slab: introduce mem_cgroup_from_obj()
- mm: fork: fix kernel_stack memcg stats for various stack implementations
[guro@fb.com: introduce mem_cgroup_from_obj()]
Link: http://lkml.kernel.org/r/20200324004221.GA36662@carbon.dhcp.thefacebook.com
Fixes: 4d96ba353075 ("mm: memcg/slab: stop setting page->mem_cgroup pointer for slab pages")
Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Bharata B Rao <bharata@linux.ibm.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200303233550.251375-1-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull networking fixes from David Miller:
1) Fix memory leak in vti6, from Torsten Hilbrich.
2) Fix double free in xfrm_policy_timer, from YueHaibing.
3) NL80211_ATTR_CHANNEL_WIDTH attribute is put with wrong type, from
Johannes Berg.
4) Wrong allocation failure check in qlcnic driver, from Xu Wang.
5) Get ks8851-ml IO operations right, for real this time, from Marek
Vasut.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (22 commits)
r8169: fix PHY driver check on platforms w/o module softdeps
net: ks8851-ml: Fix IO operations, again
mlxsw: spectrum_mr: Fix list iteration in error path
qlcnic: Fix bad kzalloc null test
mac80211: set IEEE80211_TX_CTRL_PORT_CTRL_PROTO for nl80211 TX
mac80211: mark station unauthorized before key removal
mac80211: Check port authorization in the ieee80211_tx_dequeue() case
cfg80211: Do not warn on same channel at the end of CSA
mac80211: drop data frames without key on encrypted links
ieee80211: fix HE SPR size calculation
nl80211: fix NL80211_ATTR_CHANNEL_WIDTH attribute type
xfrm: policy: Fix doulbe free in xfrm_policy_timer
bpf: Explicitly memset some bpf info structures declared on the stack
bpf: Explicitly memset the bpf_attr structure
bpf: Sanitize the bpf_struct_ops tcp-cc name
vti6: Fix memory leak of skb if input policy check fails
esp: remove the skb from the chain when it's enqueued in cryptd_wq
ipv6: xfrm6_tunnel.c: Use built-in RCU list checking
xfrm: add the missing verify_sec_ctx_len check in xfrm_add_acquire
xfrm: fix uctx len check in verify_sec_ctx_len
...
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Three more driver bugfixes, and two doc improvements fixing build
warnings while we are here"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: pca-platform: Use platform_irq_get_optional
i2c: st: fix missing struct parameter description
i2c: nvidia-gpu: Handle timeout correctly in gpu_i2c_check_status()
i2c: fix a doc warning
i2c: hix5hd2: add missed clk_disable_unprepare in remove
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Daniel Borkmann says:
====================
pull-request: bpf 2020-03-27
The following pull-request contains BPF updates for your *net* tree.
We've added 3 non-merge commits during the last 4 day(s) which contain
a total of 4 files changed, 25 insertions(+), 20 deletions(-).
The main changes are:
1) Explicitly memset the bpf_attr structure on bpf() syscall to avoid
having to rely on compiler to do so. Issues have been noticed on
some compilers with padding and other oddities where the request was
then unexpectedly rejected, from Greg Kroah-Hartman.
2) Sanitize the bpf_struct_ops TCP congestion control name in order to
avoid problematic characters such as whitespaces, from Martin KaFai Lau.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A handful of clk driver fixes.
Mostly they're around the i.MX drivers fixing the parents of a few
clks and making KASAN happy with how the message passing code works.
Besides that we have a TI driver fix for the RTC parent and a fix for
the basic gate type registration functions introduced this release
where they didn't actually pass the arguments in the right places to
the multiplexer function down below"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: imx: Align imx sc clock parent msg structs to 4
clk: imx: Align imx sc clock msg structs to 4
clk: Pass correct arguments to __clk_hw_register_gate()
clk: ti: am43xx: Fix clock parent for RTC clock
clk: imx8mp: Correct the enet_qos parent clock
clk: imx8mp: Correct IMX8MP_CLK_HDMI_AXI clock parent
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov:
- a fix to generate proper timestamps on key autorepeat events that
were broken recently
- a fix for Synaptics driver to only activate reduced reporting mode
when explicitly requested
- a new keycode for "selective screenshot" function
- other assorted fixes
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: fix stale timestamp on key autorepeat events
Input: move the new KEY_SELECTIVE_SCREENSHOT keycode
Input: avoid BIT() macro usage in the serio.h UAPI header
Input: synaptics-rmi4 - set reduced reporting mode only when requested
Input: synaptics - enable RMI on HP Envy 13-ad105ng
Input: allocate keycode for "Selective Screenshot" key
Input: tm2-touchkey - add support for Coreriver TC360 variant
dt-bindings: input: add Coreriver TC360 binding
dt-bindings: vendor-prefixes: Add Coreriver vendor prefix
Input: raydium_i2c_ts - fix error codes in raydium_i2c_boot_trigger()
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Pull ceph fixes from Ilya Dryomov:
"A patch for a rather old regression in fullness handling and two
memory leak fixes, marked for stable"
* tag 'ceph-for-5.6-rc8' of git://github.com/ceph/ceph-client:
ceph: fix memory leak in ceph_cleanup_snapid_map()
libceph: fix alloc_msg_with_page_vector() memory leaks
ceph: check POOL_FLAG_FULL/NEARFULL in addition to OSDMAP_FULL/NEARFULL
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We should try to keep keycodes sequential unless there is a reason to leave
a gap in numbering, so let's move it from 0x280 to 0x27a while we still
can.
Fixes: 3b059da9835c ("Input: allocate keycode for Selective Screenshot key")
Acked-by: Rajat Jain <rajatja@google.com>
Link: https://lore.kernel.org/r/20200326182711.GA259753@dtor-ws
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
We have the following fixes:
* drop data packets if there's no key for them anymore, after
there had been one, to avoid sending them in clear when
hostapd removes the key before it removes the station and
the packets are still queued
* check port authorization again after dequeue, to avoid
sending packets if the station is no longer authorized
* actually remove the authorization flag before the key so
packets are also dropped properly because of this
* fix nl80211 control port packet tagging to handle them as
packets allowed to go out without encryption
* fix NL80211_ATTR_CHANNEL_WIDTH outgoing netlink attribute
width (should be 32 bits, not 8)
* don't WARN in a CSA scenario that happens on some APs
* fix HE spatial reuse element size calculation
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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I copy/pasted these macros and forgot to update the argument
names and where they're passed to. Fix it so that these macros make
sense.
Reported-by: Maxime Ripard <maxime@cerno.tech>
Fixes: 194efb6e2667 ("clk: gate: Add support for specifying parents via DT/pointers")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20200325022257.148244-1-sboyd@kernel.org
Tested-by: Maxime Ripard <mripard@kernel.org>
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Pull networking fixes from David Miller:
1) Fix deadlock in bpf_send_signal() from Yonghong Song.
2) Fix off by one in kTLS offload of mlx5, from Tariq Toukan.
3) Add missing locking in iwlwifi mvm code, from Avraham Stern.
4) Fix MSG_WAITALL handling in rxrpc, from David Howells.
5) Need to hold RTNL mutex in tcindex_partial_destroy_work(), from Cong
Wang.
6) Fix producer race condition in AF_PACKET, from Willem de Bruijn.
7) cls_route removes the wrong filter during change operations, from
Cong Wang.
8) Reject unrecognized request flags in ethtool netlink code, from
Michal Kubecek.
9) Need to keep MAC in reset until PHY is up in bcmgenet driver, from
Doug Berger.
10) Don't leak ct zone template in act_ct during replace, from Paul
Blakey.
11) Fix flushing of offloaded netfilter flowtable flows, also from Paul
Blakey.
12) Fix throughput drop during tx backpressure in cxgb4, from Rahul
Lakkireddy.
13) Don't let a non-NULL skb->dev leave the TCP stack, from Eric
Dumazet.
14) TCP_QUEUE_SEQ socket option has to update tp->copied_seq as well,
also from Eric Dumazet.
15) Restrict macsec to ethernet devices, from Willem de Bruijn.
16) Fix reference leak in some ethtool *_SET handlers, from Michal
Kubecek.
17) Fix accidental disabling of MSI for some r8169 chips, from Heiner
Kallweit.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (138 commits)
net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build
net: ena: Add PCI shutdown handler to allow safe kexec
selftests/net/forwarding: define libs as TEST_PROGS_EXTENDED
selftests/net: add missing tests to Makefile
r8169: re-enable MSI on RTL8168c
net: phy: mdio-bcm-unimac: Fix clock handling
cxgb4/ptp: pass the sign of offset delta in FW CMD
net: dsa: tag_8021q: replace dsa_8021q_remove_header with __skb_vlan_pop
net: cbs: Fix software cbs to consider packet sending time
net/mlx5e: Do not recover from a non-fatal syndrome
net/mlx5e: Fix ICOSQ recovery flow with Striding RQ
net/mlx5e: Fix missing reset of SW metadata in Striding RQ reset
net/mlx5e: Enhance ICOSQ WQE info fields
net/mlx5_core: Set IB capability mask1 to fix ib_srpt connection failure
selftests: netfilter: add nfqueue test case
netfilter: nft_fwd_netdev: allow to redirect to ifb via ingress
netfilter: nft_fwd_netdev: validate family and chain type
netfilter: nft_set_rbtree: Detect partial overlaps on insertion
netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
netfilter: nft_set_pipapo: Separate partial and complete overlap cases on insertion
...
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net/netfilter/nft_fwd_netdev.c: In function ‘nft_fwd_netdev_eval’:
net/netfilter/nft_fwd_netdev.c:32:10: error: ‘struct sk_buff’ has no member named ‘tc_redirected’
pkt->skb->tc_redirected = 1;
^~
net/netfilter/nft_fwd_netdev.c:33:10: error: ‘struct sk_buff’ has no member named ‘tc_from_ingress’
pkt->skb->tc_from_ingress = 1;
^~
To avoid a direct dependency with tc actions from netfilter, wrap the
redirect bits around CONFIG_NET_REDIRECT and move helpers to
include/linux/skbuff.h. Turn on this toggle from the ifb driver, the
only existing client of these bits in the tree.
This patch adds skb_set_redirected() that sets on the redirected bit
on the skbuff, it specifies if the packet was redirect from ingress
and resets the timestamp (timestamp reset was originally missing in the
netfilter bugfix).
Fixes: bcfabee1afd99484 ("netfilter: nft_fwd_netdev: allow to redirect to ifb via ingress")
Reported-by: noreply@ellerman.id.au
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The he_sr_control field is just a u8, so le32_to_cpu()
shouldn't be applied to it; this was evidently copied
from ieee80211_he_oper_size(). Fix it, and also adjust
the type of the local variable.
Fixes: ef11a931bd1c ("mac80211: HE: add Spatial Reuse element parsing support")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20200325090918.dfe483b49e06.Ia53622f23b2610a2ae6ea39a199866196fe946c1@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Not only did this wheel did not need reinventing, but there is also
an issue with it: It doesn't remove the VLAN header in a way that
preserves the L2 payload checksum when that is being provided by the DSA
master hw. It should recalculate checksum both for the push, before
removing the header, and for the pull afterwards. But the current
implementation is quite dizzying, with pulls followed immediately
afterwards by pushes, the memmove is done before the push, etc. This
makes a DSA master with RX checksumming offload to print stack traces
with the infamous 'hw csum failure' message.
So remove the dsa_8021q_remove_header function and replace it with
something that actually works with inet checksumming.
Fixes: d461933638ae ("net: dsa: tag_8021q: Create helper function for removing VLAN header")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The commit 19ba1eb15a2a ("Input: psmouse - add a custom serio protocol
to send extra information") introduced usage of the BIT() macro
for SERIO_* flags; this macro is not provided in UAPI headers.
Replace if with similarly defined _BITUL() macro defined
in <linux/const.h>.
Fixes: 19ba1eb15a2a ("Input: psmouse - add a custom serio protocol to send extra information")
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Cc: <stable@vger.kernel.org> # v5.0+
Link: https://lore.kernel.org/r/20200324041341.GA32335@asgard.redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Unlike NL_SET_ERR_* macros, nl_set_extack_cookie_u64() and
nl_set_extack_cookie_u32() helpers do not check extack argument for null
and neither do their callers, as syzbot recently discovered for
ethnl_parse_header().
Instead of fixing the callers and leaving the trap in place, add check of
null extack to both helpers to make them consistent with NL_SET_ERR_*
macros.
v2: drop incorrect second Fixes tag
Fixes: 2363d73a2f3e ("ethtool: reject unrecognized request flags")
Reported-by: syzbot+258a9089477493cea67b@syzkaller.appspotmail.com
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make it so that CEPH_MSG_DATA_PAGES data item can own pages,
fixing a bunch of memory leaks for a page vector allocated in
alloc_msg_with_page_vector(). Currently, only watch-notify
messages trigger this allocation, and normally the page vector
is freed either in handle_watch_notify() or by the caller of
ceph_osdc_notify(). But if the message is freed before that
(e.g. if the session faults while reading in the message or
if the notify is stale), we leak the page vector.
This was supposed to be fixed by switching to a message-owned
pagelist, but that never happened.
Fixes: 1907920324f1 ("libceph: support for sending notifies")
Reported-by: Roman Penyaev <rpenyaev@suse.de>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Roman Penyaev <rpenyaev@suse.de>
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CEPH_OSDMAP_FULL/NEARFULL aren't set since mimic, so we need to consult
per-pool flags as well. Unfortunately the backwards compatibility here
is lacking:
- the change that deprecated OSDMAP_FULL/NEARFULL went into mimic, but
was guarded by require_osd_release >= RELEASE_LUMINOUS
- it was subsequently backported to luminous in v12.2.2, but that makes
no difference to clients that only check OSDMAP_FULL/NEARFULL because
require_osd_release is not client-facing -- it is for OSDs
Since all kernels are affected, the best we can do here is just start
checking both map flags and pool flags and send that to stable.
These checks are best effort, so take osdc->lock and look up pool flags
just once. Remove the FIXME, since filesystem quotas are checked above
and RADOS quotas are reflected in POOL_FLAG_FULL: when the pool reaches
its quota, both POOL_FLAG_FULL and POOL_FLAG_FULL_QUOTA are set.
Cc: stable@vger.kernel.org
Reported-by: Yanhu Cao <gmayyyha@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Sage Weil <sage@redhat.com>
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Don't let non-letters inside a literal block without escaping it, as
the toolchain would mis-interpret it:
./include/linux/i2c.h:518: WARNING: Inline strong start-string without end-string.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Merge misc fixes from Andrew Morton:
"10 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
x86/mm: split vmalloc_sync_all()
mm, slub: prevent kmalloc_node crashes and memory leaks
mm/mmu_notifier: silence PROVE_RCU_LIST warnings
epoll: fix possible lost wakeup on epoll_ctl() path
mm: do not allow MADV_PAGEOUT for CoW pages
mm, memcg: throttle allocators based on ancestral memory.high
mm, memcg: fix corruption on 64-bit divisor in memory.high throttling
page-flags: fix a crash at SetPageError(THP_SWAP)
mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case
memcg: fix NULL pointer dereference in __mem_cgroup_usage_unregister_event
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Commit 3f8fd02b1bf1 ("mm/vmalloc: Sync unmappings in
__purge_vmap_area_lazy()") introduced a call to vmalloc_sync_all() in
the vunmap() code-path. While this change was necessary to maintain
correctness on x86-32-pae kernels, it also adds additional cycles for
architectures that don't need it.
Specifically on x86-64 with CONFIG_VMAP_STACK=y some people reported
severe performance regressions in micro-benchmarks because it now also
calls the x86-64 implementation of vmalloc_sync_all() on vunmap(). But
the vmalloc_sync_all() implementation on x86-64 is only needed for newly
created mappings.
To avoid the unnecessary work on x86-64 and to gain the performance
back, split up vmalloc_sync_all() into two functions:
* vmalloc_sync_mappings(), and
* vmalloc_sync_unmappings()
Most call-sites to vmalloc_sync_all() only care about new mappings being
synchronized. The only exception is the new call-site added in the
above mentioned commit.
Shile Zhang directed us to a report of an 80% regression in reaim
throughput.
Fixes: 3f8fd02b1bf1 ("mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Shile Zhang <shile.zhang@linux.alibaba.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Borislav Petkov <bp@suse.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [GHES]
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20191009124418.8286-1-joro@8bytes.org
Link: https://lists.01.org/hyperkitty/list/lkp@lists.01.org/thread/4D3JPPHBNOSPFK2KEPC6KGKS6J25AIDB/
Link: http://lkml.kernel.org/r/20191113095530.228959-1-shile.zhang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit bd4c82c22c36 ("mm, THP, swap: delay splitting THP after swapped
out") supported writing THP to a swap device but forgot to upgrade an
older commit df8c94d13c7e ("page-flags: define behavior of FS/IO-related
flags on compound pages") which could trigger a crash during THP
swapping out with DEBUG_VM_PGFLAGS=y,
kernel BUG at include/linux/page-flags.h:317!
page dumped because: VM_BUG_ON_PAGE(1 && PageCompound(page))
page:fffff3b2ec3a8000 refcount:512 mapcount:0 mapping:000000009eb0338c index:0x7f6e58200 head:fffff3b2ec3a8000 order:9 compound_mapcount:0 compound_pincount:0
anon flags: 0x45fffe0000d8454(uptodate|lru|workingset|owner_priv_1|writeback|head|reclaim|swapbacked)
end_swap_bio_write()
SetPageError(page)
VM_BUG_ON_PAGE(1 && PageCompound(page))
<IRQ>
bio_endio+0x297/0x560
dec_pending+0x218/0x430 [dm_mod]
clone_endio+0xe4/0x2c0 [dm_mod]
bio_endio+0x297/0x560
blk_update_request+0x201/0x920
scsi_end_request+0x6b/0x4b0
scsi_io_completion+0x509/0x7e0
scsi_finish_command+0x1ed/0x2a0
scsi_softirq_done+0x1c9/0x1d0
__blk_mqnterrupt+0xf/0x20
</IRQ>
Fix by checking PF_NO_TAIL in those places instead.
Fixes: bd4c82c22c36 ("mm, THP, swap: delay splitting THP after swapped out")
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: "Huang, Ying" <ying.huang@intel.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200310235846.1319-1-cai@lca.pw
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull io_uring fixes from Jens Axboe:
"Two different fixes in here:
- Fix for a potential NULL pointer deref for links with async or
drain marked (Pavel)
- Fix for not properly checking RLIMIT_NOFILE for async punted
operations.
This affects openat/openat2, which were added this cycle, and
accept4. I did a full audit of other cases where we might check
current->signal->rlim[] and found only RLIMIT_FSIZE for buffered
writes and fallocate. That one is fixed and queued for 5.7 and
marked stable"
* tag 'io_uring-5.6-20200320' of git://git.kernel.dk/linux-block:
io_uring: make sure accept honor rlimit nofile
io_uring: make sure openat/openat2 honor rlimit nofile
io_uring: NULL-deref for IOSQE_{ASYNC,DRAIN}
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Just like commit 4022e7af86be, this fixes the fact that
IORING_OP_ACCEPT ends up using get_unused_fd_flags(), which checks
current->signal->rlim[] for limits.
Add an extra argument to __sys_accept4_file() that allows us to pass
in the proper nofile limit, and grab it at request prep time.
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Dmitry reports that a test case shows that io_uring isn't honoring a
modified rlimit nofile setting. get_unused_fd_flags() checks the task
signal->rlimi[] for the limits. As this isn't easily inheritable,
provide a __get_unused_fd_flags() that takes the value instead. Then we
can grab it when the request is prepared (from the original task), and
pass that in when we do the async part part of the open.
Reported-by: Dmitry Kadashev <dkadashev@gmail.com>
Tested-by: Dmitry Kadashev <dkadashev@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc, afs: Interruptibility fixes
Here are a number of fixes for AF_RXRPC and AFS that make AFS system calls
less interruptible and so less likely to leave the filesystem in an
uncertain state. There's also a miscellaneous patch to make tracing
consistent.
(1) Firstly, abstract out the Tx space calculation in sendmsg. Much the
same code is replicated in a number of places that subsequent patches
are going to alter, including adding another copy.
(2) Fix Tx interruptibility by allowing a kernel service, such as AFS, to
request that a call be interruptible only when waiting for a call slot
to become available (ie. the call has not taken place yet) or that a
call be not interruptible at all (e.g. when we want to do writeback
and don't want a signal interrupting a VM-induced writeback).
(3) Increase the minimum delay on MSG_WAITALL for userspace sendmsg() when
waiting for Tx buffer space as a 2*RTT delay is really small over 10G
ethernet and a 1 jiffy timeout might be essentially 0 if at the end of
the jiffy period.
(4) Fix some tracing output in AFS to make it consistent with rxrpc.
(5) Make sure aborted asynchronous AFS operations are tidied up properly
so we don't end up with stuck rxrpc calls.
(6) Make AFS client calls uninterruptible in the Rx phase. If we don't
wait for the reply to be fully gathered, we can't update the local VFS
state and we end up in an indeterminate state with respect to the
server.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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New Chrome OS keyboards have a "snip" key that is basically a selective
screenshot (allows a user to select an area of screen to be copied).
Allocate a keycode for it.
Signed-off-by: Rajat Jain <rajatja@google.com>
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Link: https://lore.kernel.org/r/20200313180333.75011-1-rajatja@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The bpf_struct_ops tcp-cc name should be sanitized in order to
avoid problematic chars (e.g. whitespaces).
This patch reuses the bpf_obj_name_cpy() for accepting the same set
of characters in order to keep a consistent bpf programming experience.
A "size" param is added. Also, the strlen is returned on success so
that the caller (like the bpf_tcp_ca here) can error out on empty name.
The existing callers of the bpf_obj_name_cpy() only need to change the
testing statement to "if (err < 0)". For all these existing callers,
the err will be overwritten later, so no extra change is needed
for the new strlen return value.
v3:
- reverse xmas tree style
v2:
- Save the orig_src to avoid "end - size" (Andrii)
Fixes: 0baf26b0fcd7 ("bpf: tcp: Support tcp_congestion_ops in bpf")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200314010209.1131542-1-kafai@fb.com
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Similar to existing nl_set_extack_cookie_u64(), add new helper
nl_set_extack_cookie_u32() which sets extack cookie to a u32 value.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull futex fix from Thomas Gleixner:
"Fix for yet another subtle futex issue.
The futex code used ihold() to prevent inodes from vanishing, but
ihold() does not guarantee inode persistence. Replace the inode
pointer with a per boot, machine wide, unique inode identifier.
The second commit fixes the breakage of the hash mechanism which
causes a 100% performance regression"
* tag 'locking-urgent-2020-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Unbreak futex hashing
futex: Fix inode life-time issue
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
- Intel VT-d fixes:
- RCU list handling fixes
- Replace WARN_TAINT with pr_warn + add_taint for reporting firmware
issues
- DebugFS fixes
- Fix for hugepage handling in iova_to_phys implementation
- Fix for handling VMD devices, which have a domain number which
doesn't fit into 16 bits
- Warning message fix
- MSI allocation fix for iommu-dma code
- Sign-extension fix for io page-table code
- Fix for AMD-Vi to properly update the is-running bit when AVIC is
used
* tag 'iommu-fixes-v5.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/vt-d: Populate debugfs if IOMMUs are detected
iommu/amd: Fix IOMMU AVIC not properly update the is_run bit in IRTE
iommu/vt-d: Ignore devices with out-of-spec domain number
iommu/vt-d: Fix the wrong printing in RHSA parsing
iommu/vt-d: Fix debugfs register reads
iommu/vt-d: quirk_ioat_snb_local_iommu: replace WARN_TAINT with pr_warn + add_taint
iommu/vt-d: dmar_parse_one_rmrr: replace WARN_TAINT with pr_warn + add_taint
iommu/vt-d: dmar: replace WARN_TAINT with pr_warn + add_taint
iommu/vt-d: Silence RCU-list debugging warnings
iommu/vt-d: Fix RCU-list bugs in intel_iommu_init()
iommu/dma: Fix MSI reservation allocation
iommu/io-pgtable-arm: Fix IOVA validation for 32-bit
iommu/vt-d: Fix a bug in intel_iommu_iova_to_phys() for huge page
iommu/vt-d: Fix RCU list debugging warnings
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A small collection of fixes. I'll make another sweep soon to look for
more fixes for this -rc series.
- Mark device node const in of_clk_get_parent APIs to ease landing
changes in users later
- Fix flag for Qualcomm SC7180 video clocks where we thought it would
never turn off but actually hardware takes care of it
- Remove disp_cc_mdss_rscc_ahb_clk on Qualcomm SC7180 SoCs because
this clk is always on anyway
- Correct some bad dt-binding numbers for i.MX8MN SoCs"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: imx8mn: Fix incorrect clock defines
clk: qcom: dispcc: Remove support of disp_cc_mdss_rscc_ahb_clk
clk: qcom: videocc: Update the clock flag for video_cc_vcodec0_core_clk
of: clk: Make of_clk_get_parent_{count,name}() parameter const
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Fix the handling of signals in client rxrpc calls made by the afs
filesystem. Ignore signals completely, leaving call abandonment or
connection loss to be detected by timeouts inside AF_RXRPC.
Allowing a filesystem call to be interrupted after the entire request has
been transmitted and an abort sent means that the server may or may not
have done the action - and we don't know. It may even be worse than that
for older servers.
Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
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Fix a couple of tracelines to indicate the usage count after the atomic op,
not the usage count before it to be consistent with other afs and rxrpc
trace lines.
Change the wording of the afs_call_trace_work trace ID label from "WORK" to
"QUEUE" to reflect the fact that it's queueing work, not doing work.
Fixes: 341f741f04be ("afs: Refcount the afs_call struct")
Signed-off-by: David Howells <dhowells@redhat.com>
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Fix the interruptibility of kernel-initiated client calls so that they're
either only interruptible when they're waiting for a call slot to come
available or they're not interruptible at all. Either way, they're not
interruptible during transmission.
This should help prevent StoreData calls from being interrupted when
writeback is in progress. It doesn't, however, handle interruption during
the receive phase.
Userspace-initiated calls are still interruptable. After the signal has
been handled, sendmsg() will return the amount of data copied out of the
buffer and userspace can perform another sendmsg() call to continue
transmission.
Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
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Pull block fixes from Jens Axboe:
"A few fixes that should go into this release. This contains:
- Fix for a corruption issue with the s390 dasd driver (Stefan)
- Fixup/improvement for the flush insertion change that we had in
this series (Ming)
- Fix for the partition suppor for host aware zoned devices
(Shin'ichiro)
- Fix incorrect blk-iocost comparison (Tejun)
The diffstat looks large, but that's a) mostly dasd, and b) the flush
fix from Ming adds a big comment"
* tag 'block-5.6-2020-03-13' of git://git.kernel.dk/linux-block:
block: Fix partition support for host aware zoned block devices
blk-mq: insert flush request to the front of dispatch queue
s390/dasd: fix data corruption for thin provisioned devices
blk-iocost: fix incorrect vtime comparison in iocg_is_idle()
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"MMC core:
- Fix HW busy detection support for host controllers requiring the
MMC_RSP_BUSY response flag (R1B) to be set for the command. In
particular for CMD6 (eMMC), erase/trim/discard (SD/eMMC) and CMD5
(eMMC sleep).
MMC host:
- sdhci-omap|tegra: Fix support for HW busy detection"
* tag 'mmc-v5.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for eMMC sleep command
mmc: sdhci-tegra: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
mmc: sdhci-omap: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for erase/trim/discard
mmc: core: Allow host controllers to require R1B for CMD6
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Commit 6825d3ea6cde ("iommu/vt-d: Add debugfs support to show register
contents") dumps the register contents for all IOMMU devices.
Currently, a 64 bit read(dmar_readq) is done for all the IOMMU registers,
even though some of the registers are 32 bits, which is incorrect.
Use the correct read function variant (dmar_readl/dmar_readq) while
reading the contents of 32/64 bit registers respectively.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Link: https://lore.kernel.org/r/1583784587-26126-2-git-send-email-megha.dey@linux.intel.com
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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|
Pull drm fixes from Dave Airlie:
"It's a bit quieter, probably not as much as it could be.
There is on large regression fix in here from Lyude for displayport
bandwidth calculations, there've been reports of multi-monitor in
docks not working since -rc1 and this has been tested to fix those.
Otherwise it's a bunch of i915 (with some GVT fixes), a set of amdgpu
watermark + bios fixes, and an exynos iommu cleanup fix.
core:
- DP MST bandwidth regression fix.
i915:
- hard lockup fix
- GVT fixes
- 32-bit alignment issue fix
- timeline wait fixes
- cacheline_retire and free
amdgpu:
- Update the display watermark bounding box for navi14
- Fix fetching vbios directly from rom on vega20/arcturus
- Navi and renoir watermark fixes
exynos:
- iommu object cleanup fix"
`
* tag 'drm-fixes-2020-03-13' of git://anongit.freedesktop.org/drm/drm:
drm/dp_mst: Rewrite and fix bandwidth limit checks
drm/dp_mst: Reprobe path resources in CSN handler
drm/dp_mst: Use full_pbn instead of available_pbn for bandwidth checks
drm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less redundant
drm/i915: Defer semaphore priority bumping to a workqueue
drm/i915/gt: Close race between cacheline_retire and free
drm/i915/execlists: Enable timeslice on partial virtual engine dequeue
drm/i915: be more solid in checking the alignment
drm/i915/gvt: Fix dma-buf display blur issue on CFL
drm/i915: Return early for await_start on same timeline
drm/i915: Actually emit the await_start
drm/amdgpu/powerplay: nv1x, renior copy dcn clock settings of watermark to smu during boot up
drm/exynos: Fix cleanup of IOMMU related objects
drm/amdgpu: correct ROM_INDEX/DATA offset for VEGA20
drm/amd/display: update soc bb for nv14
drm/i915/gvt: Fix emulated vbt size issue
drm/i915/gvt: Fix unnecessary schedule timer when no vGPU exits
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Pull networking fixes from David Miller:
"It looks like a decent sized set of fixes, but a lot of these are one
liner off-by-one and similar type changes:
1) Fix netlink header pointer to calcular bad attribute offset
reported to user. From Pablo Neira Ayuso.
2) Don't double clear PHY interrupts when ->did_interrupt is set,
from Heiner Kallweit.
3) Add missing validation of various (devlink, nl802154, fib, etc.)
attributes, from Jakub Kicinski.
4) Missing *pos increments in various netfilter seq_next ops, from
Vasily Averin.
5) Missing break in of_mdiobus_register() loop, from Dajun Jin.
6) Don't double bump tx_dropped in veth driver, from Jiang Lidong.
7) Work around FMAN erratum A050385, from Madalin Bucur.
8) Make sure ARP header is pulled early enough in bonding driver,
from Eric Dumazet.
9) Do a cond_resched() during multicast processing of ipvlan and
macvlan, from Mahesh Bandewar.
10) Don't attach cgroups to unrelated sockets when in interrupt
context, from Shakeel Butt.
11) Fix tpacket ring state management when encountering unknown GSO
types. From Willem de Bruijn.
12) Fix MDIO bus PHY resume by checking mdio_bus_phy_may_suspend()
only in the suspend context. From Heiner Kallweit"
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (112 commits)
net: systemport: fix index check to avoid an array out of bounds access
tc-testing: add ETS scheduler to tdc build configuration
net: phy: fix MDIO bus PM PHY resuming
net: hns3: clear port base VLAN when unload PF
net: hns3: fix RMW issue for VLAN filter switch
net: hns3: fix VF VLAN table entries inconsistent issue
net: hns3: fix "tc qdisc del" failed issue
taprio: Fix sending packets without dequeueing them
net: mvmdio: avoid error message for optional IRQ
net: dsa: mv88e6xxx: Add missing mask of ATU occupancy register
net: memcg: fix lockdep splat in inet_csk_accept()
s390/qeth: implement smarter resizing of the RX buffer pool
s390/qeth: refactor buffer pool code
s390/qeth: use page pointers to manage RX buffer pool
seg6: fix SRv6 L2 tunnels to use IANA-assigned protocol number
net: dsa: Don't instantiate phylink for CPU/DSA ports unless needed
net/packet: tpacket_rcv: do not increment ring index on drop
sxgbe: Fix off by one in samsung driver strncpy size arg
net: caif: Add lockdep expression to RCU traversal primitive
MAINTAINERS: remove Sathya Perla as Emulex NIC maintainer
...
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DisplayPort specifications are fun. For a while, it's been really
unclear to us what available_pbn actually does. There's a somewhat vague
explanation in the DisplayPort spec (starting from 1.2) that partially
explains it:
The minimum payload bandwidth number supported by the path. Each node
updates this number with its available payload bandwidth number if its
payload bandwidth number is less than that in the Message Transaction
reply.
So, it sounds like available_pbn represents the smallest link rate in
use between the source and the branch device. Cool, so full_pbn is just
the highest possible PBN that the branch device supports right?
Well, we assumed that for quite a while until Sean Paul noticed that on
some MST hubs, available_pbn will actually get set to 0 whenever there's
any active payloads on the respective branch device. This caused quite a
bit of confusion since clearing the payload ID table would end up fixing
the available_pbn value.
So, we just went with that until commit cd82d82cbc04 ("drm/dp_mst: Add
branch bandwidth validation to MST atomic check") started breaking
people's setups due to us getting erroneous available_pbn values. So, we
did some more digging and got confused until we finally looked at the
definition for full_pbn:
The bandwidth of the link at the trained link rate and lane count
between the DP Source device and the DP Sink device with no time slots
allocated to VC Payloads, represented as a Payload Bandwidth Number. As
with the Available_Payload_Bandwidth_Number, this number is determined
by the link with the lowest lane count and link rate.
That's what we get for not reading specs closely enough, hehe. So, since
full_pbn is definitely what we want for doing bandwidth restriction
checks - let's start using that instead and ignore available_pbn
entirely.
Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: cd82d82cbc04 ("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
Cc: Mikita Lipski <mikita.lipski@amd.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Sean Paul <sean@poorly.run>
Reviewed-by: Mikita Lipski <mikita.lipski@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200306234623.547525-3-lyude@redhat.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
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So far we have the unfortunate situation that mdio_bus_phy_may_suspend()
is called in suspend AND resume path, assuming that function result is
the same. After the original change this is no longer the case,
resulting in broken resume as reported by Geert.
To fix this call mdio_bus_phy_may_suspend() in the suspend path only,
and let the phy_device store the info whether it was suspended by
MDIO bus PM.
Fixes: 503ba7c69610 ("net: phy: Avoid multiple suspends")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu:
"Fix a build problem with x86/curve25519"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: x86/curve25519 - support assemblers with no adx support
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Commit b72053072c0b ("block: allow partitions on host aware zone
devices") introduced the helper function disk_has_partitions() to check
if a given disk has valid partitions. However, since this function result
directly depends on the disk partition table length rather than the
actual existence of valid partitions in the table, it returns true even
after all partitions are removed from the disk. For host aware zoned
block devices, this results in zone management support to be kept
disabled even after removing all partitions.
Fix this by changing disk_has_partitions() to walk through the partition
table entries and return true if and only if a valid non-zero size
partition is found.
Fixes: b72053072c0b ("block: allow partitions on host aware zone devices")
Cc: stable@vger.kernel.org # 5.5
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The Internet Assigned Numbers Authority (IANA) has recently assigned
a protocol number value of 143 for Ethernet [1].
Before this assignment, encapsulation mechanisms such as Segment Routing
used the IPv6-NoNxt protocol number (59) to indicate that the encapsulated
payload is an Ethernet frame.
In this patch, we add the definition of the Ethernet protocol number to the
kernel headers and update the SRv6 L2 tunnels to use it.
[1] https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
Signed-off-by: Paolo Lungaroni <paolo.lungaroni@cnit.it>
Reviewed-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Acked-by: Ahmed Abdelsalam <ahmed.abdelsalam@gssi.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
Takashi Iwai
Eugene Syromiatnikov
Jiri Slaby
Linus Torvalds
Roman Gushchin
David S. Miller
Dmitry Torokhov
Stephen Boyd
Pablo Neira Ayuso
Johannes Berg
Vladimir Oltean
Michal Kubecek
Ilya Dryomov
Mauro Carvalho Chehab
Joerg Roedel
Qian Cai
Jens Axboe
Rajat Jain
Martin KaFai Lau
David Howells
Megha Dey
Lyude Paul
Heiner Kallweit
Shin'ichiro Kawasaki
Paolo Lungaroni