| Age | Commit message (Collapse) | Author |
|---|
|
Previously, in the userspace, it was possible to use the "setterm" command
from util-linux to blank the VT console by default, using the following
command.
According to the man page,
> The force option keeps the screen blank even if a key is pressed.
It was implemented by calling TIOCL_BLANKSCREEN.
case BLANKSCREEN:
ioctlarg = TIOCL_BLANKSCREEN;
if (ioctl(STDIN_FILENO, TIOCLINUX, &ioctlarg))
warn(_("cannot force blank"));
break;
However, after Linux 4.12, this command ceased to work anymore, which is
unexpected. By inspecting the kernel source, it shows that the issue was
triggered by the side-effect from commit a4199f5eb809 ("tty: Disable
default console blanking interval").
The console blanking is implemented by function do_blank_screen() in vt.c:
"blank_state" will be initialized to "blank_normal_wait" in con_init() if
AND ONLY IF ("blankinterval" > 0). If "blankinterval" is 0, "blank_state"
will be "blank_off" (== 0), and a call to do_blank_screen() will always
abort, even if a forced blanking is required from the user by calling
TIOCL_BLANKSCREEN, the console won't be blanked.
This behavior is unexpected from a user's point-of-view, since it's not
mentioned in any documentation. The setterm man page suggests it will
always work, and the kernel comments in uapi/linux/tiocl.h says
> /* keep screen blank even if a key is pressed */
> #define TIOCL_BLANKSCREEN 14
To fix it, we simply remove the "blank_state != blank_off" check, as
pointed out by Nicolas Pitre, this check doesn't logically make sense
and it's safe to remove.
Suggested-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Fixes: a4199f5eb809 ("tty: Disable default console blanking interval")
Signed-off-by: Yifeng Li <tomli@tomli.me>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The bug manifests as an attempt to access deallocated memory:
BUG: unable to handle kernel paging request at ffff9c8735448000
#PF error: [PROT] [WRITE]
PGD 288a05067 P4D 288a05067 PUD 288a07067 PMD 7f60c2063 PTE 80000007f5448161
Oops: 0003 [#1] PREEMPT SMP
CPU: 6 PID: 388 Comm: loadkeys Tainted: G C 5.0.0-rc6-00153-g5ded5871030e #91
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./H77M-D3H, BIOS F12 11/14/2013
RIP: 0010:__memmove+0x81/0x1a0
Code: 4c 89 4f 10 4c 89 47 18 48 8d 7f 20 73 d4 48 83 c2 20 e9 a2 00 00 00 66 90 48 89 d1 4c 8b 5c 16 f8 4c 8d 54 17 f8 48 c1 e9 03 <f3> 48 a5 4d 89 1a e9 0c 01 00 00 0f 1f 40 00 48 89 d1 4c 8b 1e 49
RSP: 0018:ffffa1b9002d7d08 EFLAGS: 00010203
RAX: ffff9c873541af43 RBX: ffff9c873541af43 RCX: 00000c6f105cd6bf
RDX: 0000637882e986b6 RSI: ffff9c8735447ffb RDI: ffff9c8735447ffb
RBP: ffff9c8739cd3800 R08: ffff9c873b802f00 R09: 00000000fffff73b
R10: ffffffffb82b35f1 R11: 00505b1b004d5b1b R12: 0000000000000000
R13: ffff9c873541af3d R14: 000000000000000b R15: 000000000000000c
FS: 00007f450c390580(0000) GS:ffff9c873f180000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff9c8735448000 CR3: 00000007e213c002 CR4: 00000000000606e0
Call Trace:
vt_do_kdgkb_ioctl+0x34d/0x440
vt_ioctl+0xba3/0x1190
? __bpf_prog_run32+0x39/0x60
? mem_cgroup_commit_charge+0x7b/0x4e0
tty_ioctl+0x23f/0x920
? preempt_count_sub+0x98/0xe0
? __seccomp_filter+0x67/0x600
do_vfs_ioctl+0xa2/0x6a0
? syscall_trace_enter+0x192/0x2d0
ksys_ioctl+0x3a/0x70
__x64_sys_ioctl+0x16/0x20
do_syscall_64+0x54/0xe0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The bug manifests on systemd systems with multiple vtcon devices:
# cat /sys/devices/virtual/vtconsole/vtcon0/name
(S) dummy device
# cat /sys/devices/virtual/vtconsole/vtcon1/name
(M) frame buffer device
There systemd runs 'loadkeys' tool in tapallel for each vtcon
instance. This causes two parallel ioctl(KDSKBSENT) calls to
race into adding the same entry into 'func_table' array at:
drivers/tty/vt/keyboard.c:vt_do_kdgkb_ioctl()
The function has no locking around writes to 'func_table'.
The simplest reproducer is to have initrams with the following
init on a 8-CPU machine x86_64:
#!/bin/sh
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
loadkeys -q windowkeys ru4 &
wait
The change adds lock on write path only. Reads are still racy.
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Jiri Slaby <jslaby@suse.com>
Link: https://lkml.org/lkml/2019/2/17/256
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
ipw->attr_memory and ipw->common_memory are assigned with the
return value of ioremap. ioremap may fail, but no checks
are enforced. The fix inserts the checks to avoid potential
NULL pointer dereferences.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The intention was clearly to use the tty_pgrp local variable rather than
re-read tty->pgrp outside of ctrl_lock, so do that.
This bug was introduced by commit 2812d9e9fd94 ("tty: Combine
SIGTTOU/SIGTTIN handling").
Signed-off-by: David Emett <dave@sp4m.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Building with W=1 reports (among other things):
CC drivers/tty/tty_jobctrl.o
drivers/tty/tty_jobctrl.c:317: warning: Cannot understand *
on line 317 - I thought it was a doc line
Fix up the non-kerneldoc comment. (other warnings to be cleaned up in separate patch)
Signed-off-by Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Systems which don't provide arch_trigger_cpumask_backtrace() will
invoke showacpu() from a smp_call_function() function which is invoked
with disabled interrupts even on -RT systems.
The function acquires the show_lock lock which only purpose is to
ensure that the CPUs don't print simultaneously. Otherwise the
output would clash and it would be hard to tell the output from CPUx
apart from CPUy.
On -RT the spin_lock() can not be acquired from this context. A
raw_spin_lock() is required. It will introduce the system's latency
by performing the sysrq request and other CPUs will block on the lock
until the request is done. This is okay because the user asked for a
backtrace of all active CPUs and under "normal circumstances in
production" this path should not be triggered.
Signed-off-by: Julien Grall <julien.grall@arm.com>
[bigeasy@linuxtronix.de: commit description]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Unlike 'client_ops' which is initialized to 'default_client_ops', the
port operations 'ops' may be left to NULL.
Check the 'ops' value before checking the 'ops->x' value.
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
There is an ACPI method to enumerate such devices via specific ACPI ID
and use of compatible strings. It will not work for the drivers which
have no OF match ID table present.
Reported-by: Georgii Staroselskii <georgii.staroselskii@emlid.com>
Tested-By: Georgii Staroselskii <georgii.staroselskii@emlid.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Instead of open coded variants, switch to direct use of
device_get_match_data().
Tested-By: Georgii Staroselskii <georgii.staroselskii@emlid.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
If the property is provided and there are no other possibilities to detect
UART clock frequency, use it as a fallback.
Tested-By: Georgii Staroselskii <georgii.staroselskii@emlid.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Add DMA mode support for the Spreadtrum serial controller.
Signed-off-by: Lanqing Liu <lanqing.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
This patch adds power management for the Spreadtrum serial controller.
Signed-off-by: Lanqing Liu <lanqing.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Fix sparse warning:
drivers/tty/serial/8250/8250_fintek.c:306:6: warning:
symbol 'fintek_8250_set_termios' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Echo "" to /sys/module/kgdboc/parameters/kgdboc will fail with "No such
device” error.
This is caused by function "configure_kgdboc" who init err to ENODEV
when the config is empty (legal input) the code go out with ENODEV
returned.
Fixes: 2dd453168643 ("kgdboc: Fix restrict error")
Signed-off-by: Wentao Wang <witallwang@gmail.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
In half-duplex operation, RX should be started after TX completes.
If DMA is used, there is a case when the DMA transfer completes but the
TX FIFO is not emptied, so the RX cannot be restarted just yet.
Use a boolean variable to store this state and rearm TX interrupt mask
to be signaled again that the transfer finished. In interrupt transmit
handler this variable is used to start RX. A warning message is generated
if RX is activated before TX fifo is cleared.
Fixes: b389f173aaa1 ("tty/serial: atmel: RS485 half duplex w/DMA: enable
RX after TX is done")
Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Use a helper function to check that a port needs to use half duplex
communication, replacing several occurrences of multi-line bit checking.
Fixes: b389f173aaa1 ("tty/serial: atmel: RS485 half duplex w/DMA: enable RX after TX is done")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Intel IOMMU, when enabled, tries to find the domain of the device,
assuming it's a PCI one, during DMA operations, such as mapping or
unmapping. Since we are splitting the actual PCI device to couple of
children via MFD framework (see drivers/mfd/intel-lpss.c for details),
the DMA device appears to be a platform one, and thus not an actual one
that performs DMA. In a such situation IOMMU can't find or allocate
a proper domain for its operations. As a result, all DMA operations are
failed.
In order to fix this, supply parent of the platform device
to the DMA engine framework and fix filter functions accordingly.
We may rely on the fact that parent is a real PCI device, because no
other configuration is present in the wild.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [for tty parts]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
|
|
We disable transmission interrupt (clear SCSCR_TIE) after all data has been transmitted
(if uart_circ_empty(xmit)). While transmitting, if the data is still in the tty buffer,
re-enable the SCSCR_TIE bit, which was done at sci_start_tx().
This is unnecessary processing, wasting CPU operation if the data transmission length is large.
And further, transmit end, FIFO empty bits disabling have also been performed in the step above.
Signed-off-by: Hoan Nguyen An <na-hoan@jinso.co.jp>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Andrey has reported on OpenWrt's bug tracking system[1], that he
currently can't use ar93xx_uart as pure serial UART without console
(CONFIG_SERIAL_8250_CONSOLE and CONFIG_SERIAL_AR933X_CONSOLE undefined),
because compilation ends with following error:
ar933x_uart.c: In function 'ar933x_uart_console_write':
ar933x_uart.c:550:14: error: 'struct uart_port' has no
member named 'sysrq'
So this patch moves all the code related to console handling behind
series of CONFIG_SERIAL_AR933X_CONSOLE ifdefs.
1. https://bugs.openwrt.org/index.php?do=details&task_id=2152
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Andrey Batyiev <batyiev@gmail.com>
Reported-by: Andrey Batyiev <batyiev@gmail.com>
Tested-by: Andrey Batyiev <batyiev@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
When building with -Wsometimes-uninitialized, Clang warns:
drivers/tty/serial/qcom_geni_serial.c:1079:6: warning: variable 'baud'
is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
It's not wrong; when options is NULL, baud has no default value. Use
9600 as that is a sane default.
Link: https://github.com/ClangBuiltLinux/linux/issues/395
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Add the missing uart_unregister_driver() and i2c_del_driver() before return
from sc16is7xx_init() in the error handling case.
Signed-off-by: Mao Wenan <maowenan@huawei.com>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
In case ioremap fails, the fix returns -ENOMEM to avoid NULL
pointer dereferences.
Multiple places use port.membase.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
In case dmaengine_prep_dma_cyclic fails, the fix returns a proper
error code to avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Fixes: 34df42f59a60 ("serial: at91: add rx dma support")
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
of_match_device can return a NULL pointer when matching device is not
found. This patch avoids a scenario causing NULL pointer derefernce.
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
of_match_device on failure to find a matching device can return a NULL
pointer. The patch checks for such a scenrio and passes the error upstream.
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Pull dmaengine updates from Vinod Koul:
- dmatest updates for modularizing common struct and code
- remove SG support for VDMA xilinx IP and updates to driver
- Update to dw driver to support Intel iDMA controllers multi-block
support
- tegra updates for proper reporting of residue
- Add Snow Ridge ioatdma device id and support for IOATDMA v3.4
- struct_size() usage and useless LIST_HEAD cleanups in subsystem.
- qDMA controller driver for Layerscape SoCs
- stm32-dma PM Runtime support
- And usual updates to imx-sdma, sprd, Documentation, fsl-edma,
bcm2835, qcom_hidma etc
* tag 'dmaengine-5.1-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (81 commits)
dmaengine: imx-sdma: fix consistent dma test failures
dmaengine: imx-sdma: add a test for imx8mq multi sdma devices
dmaengine: imx-sdma: add clock ratio 1:1 check
dmaengine: dmatest: move test data alloc & free into functions
dmaengine: dmatest: add short-hand `buf_size` var in dmatest_func()
dmaengine: dmatest: wrap src & dst data into a struct
dmaengine: ioatdma: support latency tolerance report (LTR) for v3.4
dmaengine: ioatdma: add descriptor pre-fetch support for v3.4
dmaengine: ioatdma: disable DCA enabling on IOATDMA v3.4
dmaengine: ioatdma: Add Snow Ridge ioatdma device id
dmaengine: sprd: Change channel id to slave id for DMA cell specifier
dt-bindings: dmaengine: sprd: Change channel id to slave id for DMA cell specifier
dmaengine: mv_xor: Use correct device for DMA API
Documentation :dmaengine: clarify DMA desc. pointer after submission
Documentation: dmaengine: fix dmatest.rst warning
dmaengine: k3dma: Add support for dma-channel-mask
dmaengine: k3dma: Delete axi_config
dmaengine: k3dma: Upgrade k3dma driver to support hisi_asp_dma hardware
Documentation: bindings: dma: Add binding for dma-channel-mask
Documentation: bindings: k3dma: Extend the k3dma driver binding to support hisi-asp
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
- Use match_string() instead of reimplementing it (Andy Shevchenko)
- Enable SERR# forwarding for all bridges (Bharat Kumar Gogada)
- Use Latency Tolerance Reporting if already enabled by platform (Bjorn
Helgaas)
- Save/restore LTR info for suspend/resume (Bjorn Helgaas)
- Fix DPC use of uninitialized data (Dongdong Liu)
- Probe bridge window attributes only once at enumeration-time to fix
device accesses during rescan (Bjorn Helgaas)
- Return BAR size (not "size -1 ") from pci_size() to simplify code (Du
Changbin)
- Use config header type (not class code) identify bridges more
reliably (Honghui Zhang)
- Work around Intel Denverton incorrect Trace Hub BAR size reporting
(Alexander Shishkin)
- Reorder pciehp cached state/hardware state updates to avoid missed
interrupts (Mika Westerberg)
- Turn ibmphp semaphores into completions or mutexes (Arnd Bergmann)
- Mark expected switch fall-through (Mathieu Malaterre)
- Use of_node_name_eq() for node name comparisons (Rob Herring)
- Add ACS and pciehp quirks for HXT SD4800 (Shunyong Yang)
- Consolidate Rohm Vendor ID definitions (Andy Shevchenko)
- Use u32 (not __u32) for things not exposed to userspace (Logan
Gunthorpe)
- Fix locking semantics of bus and slot reset interfaces (Alex
Williamson)
- Update PCIEPORTBUS Kconfig help text (Hou Zhiqiang)
- Allow portdrv to claim subtractive decode Ports so PCIe services will
work for them (Honghui Zhang)
- Report PCIe links that become degraded at run-time (Alexandru
Gagniuc)
- Blacklist Gigabyte X299 Root Port power management to fix Thunderbolt
hotplug (Mika Westerberg)
- Revert runtime PM suspend/resume callbacks that broke PME on network
cable plug (Mika Westerberg)
- Disable Data Link State Changed interrupts to prevent wakeup
immediately after suspend (Mika Westerberg)
- Extend altera to support Stratix 10 (Ley Foon Tan)
- Allow building altera driver on ARM64 (Ley Foon Tan)
- Replace Douglas with Tom Joseph as Cadence PCI host/endpoint
maintainer (Lorenzo Pieralisi)
- Add DT support for R-Car RZ/G2E (R8A774C0) (Fabrizio Castro)
- Add dra72x/dra74x/dra76x SoC compatible strings (Kishon Vijay Abraham I)
- Enable x2 mode support for dra72x/dra74x/dra76x SoC (Kishon Vijay
Abraham I)
- Configure dra7xx PHY to PCIe mode (Kishon Vijay Abraham I)
- Simplify dwc (remove unnecessary header includes, name variables
consistently, reduce inverted logic, etc) (Gustavo Pimentel)
- Add i.MX8MQ support (Andrey Smirnov)
- Add message to help debug dwc MSI-X mask bit errors (Gustavo
Pimentel)
- Work around imx7d PCIe PLL erratum (Trent Piepho)
- Don't assert qcom reset GPIO during probe (Bjorn Andersson)
- Skip dwc MSI init if MSIs have been disabled (Lucas Stach)
- Use memcpy_fromio()/memcpy_toio() instead of plain memcpy() in PCI
endpoint framework (Wen Yang)
- Add interface to discover supported endpoint features to replace a
bitfield that wasn't flexible enough (Kishon Vijay Abraham I)
- Implement the new supported-feature interface for designware-plat,
dra7xx, rockchip, cadence (Kishon Vijay Abraham I)
- Fix issues with 64-bit BAR in endpoints (Kishon Vijay Abraham I)
- Add layerscape endpoint mode support (Xiaowei Bao)
- Remove duplicate struct hv_vp_set in favor of struct hv_vpset (Maya
Nakamura)
- Rework hv_irq_unmask() to use cpumask_to_vpset() instead of
open-coded reimplementation (Maya Nakamura)
- Align Hyper-V struct retarget_msi_interrupt arguments (Maya Nakamura)
- Fix mediatek MMIO size computation to enable full size of available
MMIO space (Honghui Zhang)
- Fix mediatek DMA window size computation to allow endpoint DMA access
to full DRAM address range (Honghui Zhang)
- Fix mvebu prefetchable BAR regression caused by common bridge
emulation that assumed all bridges had prefetchable windows (Thomas
Petazzoni)
- Make advk_pci_bridge_emul_ops static (Wei Yongjun)
- Configure MPS settings for VMD root ports (Jon Derrick)
* tag 'pci-v5.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (92 commits)
PCI: Update PCIEPORTBUS Kconfig help text
PCI: Fix "try" semantics of bus and slot reset
PCI/LINK: Report degraded links via link bandwidth notification
dt-bindings: PCI: altera: Add altr,pcie-root-port-2.0
PCI: altera: Enable driver on ARM64
PCI: altera: Add Stratix 10 PCIe support
PCI/PME: Fix possible use-after-free on remove
PCI: aardvark: Make symbol 'advk_pci_bridge_emul_ops' static
PCI: dwc: skip MSI init if MSIs have been explicitly disabled
PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset()
PCI: hv: Replace hv_vp_set with hv_vpset
PCI: hv: Add __aligned(8) to struct retarget_msi_interrupt
PCI: mediatek: Enlarge PCIe2AHB window size to support 4GB DRAM
PCI: mediatek: Fix memory mapped IO range size computation
PCI: dwc: Remove superfluous shifting in definitions
PCI: dwc: Make use of GENMASK/FIELD_PREP
PCI: dwc: Make use of BIT() in constant definitions
PCI: dwc: Share code for dw_pcie_rd/wr_other_conf()
PCI: dwc: Make use of IS_ALIGNED()
PCI: imx6: Add code to request/control "pcie_aux" clock for i.MX8MQ
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
Pull audit updates from Paul Moore:
"A lucky 13 audit patches for v5.1.
Despite the rather large diffstat, most of the changes are from two
bug fix patches that move code from one Kconfig option to another.
Beyond that bit of churn, the remaining changes are largely cleanups
and bug-fixes as we slowly march towards container auditing. It isn't
all boring though, we do have a couple of new things: file
capabilities v3 support, and expanded support for filtering on
filesystems to solve problems with remote filesystems.
All changes pass the audit-testsuite. Please merge for v5.1"
* tag 'audit-pr-20190305' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
audit: mark expected switch fall-through
audit: hide auditsc_get_stamp and audit_serial prototypes
audit: join tty records to their syscall
audit: remove audit_context when CONFIG_ AUDIT and not AUDITSYSCALL
audit: remove unused actx param from audit_rule_match
audit: ignore fcaps on umount
audit: clean up AUDITSYSCALL prototypes and stubs
audit: more filter PATH records keyed on filesystem magic
audit: add support for fcaps v3
audit: move loginuid and sessionid from CONFIG_AUDITSYSCALL to CONFIG_AUDIT
audit: add syscall information to CONFIG_CHANGE records
audit: hand taken context to audit_kill_trees for syscall logging
audit: give a clue what CONFIG_CHANGE op was involved
|
|
Existing driver checks for alternate clock if devm_clk_get() fails
and returns error code for last clock failure. If xilinx_uartps is
called before clock driver, devm_clk_get() returns -EPROBE_DEFER.
In this case, probe should not check for alternate clock as main
clock is already present in DTS and return -EPROBE_DEFER only.
This patch fixes it by not checking for alternate clock when main
clock get returns -EPROBE_DEFER.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
When the source clock is not divisible by the expected baud rate and
the remainder is not less than half of the expected baud rate, the old
formular will round up the frequency division coefficient. This will
make the actual baud rate less than the expected value and can not meet
the external transmission requirements.
Thus this patch modifies the baud rate calculation formula to support
the serial controller output the maximum baud rate.
Signed-off-by: Lanqing Liu <lanqing.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
There are two other drivers that bind to mrvl,mmp-uart and both of them
assume register shift of 2 bits. There are device trees that lack the
property and rely on that assumption.
If this driver wins the race to bind to those devices, it should behave
the same as the older deprecated driver.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Like the other OF-enabled drivers, use the port number from the firmware if
the devicetree specifies an alias:
aliases {
...
serial2 = &uart2; /* Should be ttyS2 */
}
This is how the deprecated pxa.c driver behaved, switching to 8250_pxa
messes up the numbering.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
This patch fixes the following warning:
drivers/tty/hvc/hvc_xen.c: In function ‘xencons_backend_changed’:
drivers/tty/hvc/hvc_xen.c:493:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (dev->state == XenbusStateClosed)
^
drivers/tty/hvc/hvc_xen.c:496:2: note: here
case XenbusStateClosing:
^~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warnings:
drivers/tty/n_gsm.c: In function ‘gsm_dlci_data’:
drivers/tty/n_gsm.c:1582:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (tty) {
^
drivers/tty/n_gsm.c:1587:2: note: here
case 1:
^~~~
drivers/tty/n_gsm.c: In function ‘gsm1_receive’:
CC [M] drivers/scsi/snic/snic_disc.o
CC [M] drivers/net/wireless/realtek/rtlwifi/pci.o
CC drivers/usb/early/xhci-dbc.o
drivers/tty/n_gsm.c:1981:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
gsm->fcs = INIT_FCS;
^
drivers/tty/n_gsm.c:1983:2: note: here
case GSM_ADDRESS: /* Address continuation */
^~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Due to the complexities of modern Qualcomm SoCs, about a half dozen drivers
must successfully probe before the clocks for the console are present, and
the console can successfully probe. Depending on several random factors
such as probe order and modules vs builtin, msm_serial may not be able to
successfully probe for some, at which point, __init annotated functions
may become unmapped. If this occurs, msm_console_setup() will be called
from the probe path, but will no longer exist, resulting in a kernel
panic.
Resolve this issue by removing the __init annotation from
msm_console_setup().
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The Exynos 5260, like the 5433, appears to require baud clock as
well as pclk to be running before accessing any of the registers,
otherwise an external abort is raised.
The serial driver already enables baud clock when required, but only
if it knows which clock is baud clock. On older SoCs baud clock may be
selected from a number of possible clocks so to support this the driver
only selects which clock to use for baud clock when a port is opened,
at which point the desired baud rate is known and the best clock can be
selected.
The result is that there are a number of circumstances in which
registers are accessed without first explicitly enabling baud clock:
- while the driver is being initialised
- the initial parts of opening a port for the first time
- when resuming if the port hasn't been already opened
The 5433 overcomes this currently by marking the baud clock as
CLK_IGNORE_UNUSED, so the clock is always enabled, however
for the 5260 I've been trying to avoid this.
This change adds code to pick the first available clock to use
as baud clock and enables it while initialising the driver.
This code wouldn't be sufficient on a SoC which supports
multiple possible baud clock sources _and_ requires the
correct baud clock to be enabled before accessing any of the
serial port registers (in particular the register which selects
which clock to use as the baud clock). As far as I know
such hardware doesn't exist.
Signed-off-by: Stuart Menefy <stuart.menefy@mathembedded.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
If RX is disabled while there are still unprocessed bytes in RX FIFO,
cdns_uart_handle_rx() called from interrupt handler will get stuck in
the receive loop as read bytes will not get removed from the RX FIFO
and CDNS_UART_SR_RXEMPTY bit will never get set.
Avoid the stuck handler by checking first if RX is disabled. port->lock
protects against race with RX-disabling functions.
This HW behavior was mentioned by Nathan Rossi in 43e98facc4a3 ("tty:
xuartps: Fix RX hang, and TX corruption in termios call") which fixed a
similar issue in cdns_uart_set_termios().
The behavior can also be easily verified by e.g. setting
CDNS_UART_CR_RX_DIS at the beginning of cdns_uart_handle_rx() - the
following loop will then get stuck.
Resetting the FIFO using RXRST would not set RXEMPTY either so simply
issuing a reset after RX-disable would not work.
I observe this frequently on a ZynqMP board during heavy RX load at 1M
baudrate when the reader process exits and thus RX gets disabled.
Fixes: 61ec9016988f ("tty/serial: add support for Xilinx PS UART")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
unlikely has already included in IS_ERR(),
so just remove redundant likely annotation.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warning:
drivers/tty/n_hdlc.c: In function ‘n_hdlc_tty_ioctl’:
drivers/tty/n_hdlc.c:775:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
switch (arg) {
^~~~~~
drivers/tty/n_hdlc.c:782:2: note: here
default:
^~~~~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
chip use the pci_pericom_setup()
The four port Pericom chips have the fourth port at the wrong address.
Make use of quirk to fix it.
Fixes: c8d192428f52 ("serial: 8250: added acces i/o products quad and octal serial cards")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Jay Dolan <jay.dolan@accesio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Have the correct number of ports created for ACCES serial cards. Two port
cards show up as four ports, and four port cards show up as eight.
Fixes: c8d192428f52 ("serial: 8250: added acces i/o products quad and octal serial cards")
Signed-off-by: Jay Dolan <jay.dolan@accesio.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Commit 4b4ecd9cb853 ("vt: Perform safe console erase only once") removed
what appeared to be an extra call to scr_memsetw(). This missed the fact
that set_origin() must be called before clearing the screen otherwise
old screen content gets restored on the screen when using vgacon. Let's
fix that by moving all the scrollback handling to flush_scrollback()
where it logically belongs, and invoking it before the actual screen
clearing in csi_J(), making the code simpler in the end.
Reported-by: Matthew Whitehead <tedheadster@gmail.com>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Matthew Whitehead <tedheadster@gmail.com>
Fixes: 4b4ecd9cb853 ("vt: Perform safe console erase only once")
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Use pci_iomap instead of ioremap_nocache in nozomi_card_init(). This
is a cleaner way to do PCI MMIO (performs additional checks) and
allows to drop the manual call to pci_resource_start.
pci_iomap relies on ioremap for MMIO and thus has uncached behavior.
Signed-off-by: Hugo Lefeuvre <hle@owl.eu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The ISA support in this driver is horribly outdated and the last
driver that passes a NULL dev argument to the DMA mapping routines.
Drop the support, if someone wants to go through the work of converting
it to a proper isa_driver we can resurrect it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
serial_pci_is_blacklisted() is very similar to pci_match_id() implementation.
Replace it with the latter.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
We need the tty fixes in here for other patches to be based on.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small tty and serial fixes for 5.0-rc6.
Nothing huge, just a few small fixes for reported issues. The speakup
fix is in here as it is a tty operation issue.
All of these have been in linux-next for a while with no reported
problems"
* tag 'tty-5.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: fix race between flush_to_ldisc and tty_open
staging: speakup: fix tty-operation NULL derefs
serial: sh-sci: Do not free irqs that have already been freed
serial: 8250_pci: Make PCI class test non fatal
tty: serial: 8250_mtk: Fix potential NULL pointer dereference
|
|
various supported ICs.
The MODE1 register bits have different values for different ICs.
This patch corrects the initial setting of this register in accordance
with the datasheets, which will allow you to get the expected values
when debugging the driver.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
AUDIT_TTY records were logged as seperate events from their syscall
records. Join them so they are logged as the single event that they
are.
Please see the github issue
https://github.com/linux-audit/audit-kernel/issues/106
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
Pull RISC-V fixes from Palmer Dabbelt:
"This contains a handful of mostly-independent patches:
- make our port respect TIF_NEED_RESCHED, which fixes
CONFIG_PREEMPT=y kernels
- fix double-put of OF nodes
- fix a misspelling of target in our Kconfig
- generic PCIe is enabled in our defconfig
- fix our SBI early console to properly handle line
endings
- fix max_low_pfn being counted in PFNs
- a change to TASK_UNMAPPED_BASE to match what other
arches do
This has passed my standard 'boot Fedora' flow"
* tag 'riscv-for-linus-5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
riscv: Adjust mmap base address at a third of task size
riscv: fixup max_low_pfn with PFN_DOWN.
tty/serial: use uart_console_write in the RISC-V SBL early console
RISC-V: defconfig: Add CRYPTO_DEV_VIRTIO=y
RISC-V: defconfig: Enable Generic PCIE by default
RISC-V: defconfig: Move CONFIG_PCI{,E_XILINX}
RISC-V: Kconfig: fix spelling mistake "traget" -> "target"
RISC-V: asm/page.h: fix spelling mistake "CONFIG_64BITS" -> "CONFIG_64BIT"
RISC-V: fix bad use of of_node_put
RISC-V: Add _TIF_NEED_RESCHED check for kernel thread when CONFIG_PREEMPT=y
|
Yifeng Li
Sergei Trofimovich
Kangjie Lu
David Emett
Valdis Klētnieks
Julien Grall
Fabien Dessenne
Andy Shevchenko
Lanqing Liu
YueHaibing
Wentao Wang
Razvan Stefanescu
Hoan Nguyen An
Petr Štetiar
Nathan Chancellor
Mao Wenan
Aditya Pakki
Linus Torvalds
Rajan Vaja
Lubomir Rintel
Gustavo A. R. Silva
Jeffrey Hugo
Stuart Menefy
Anssi Hannula
Chengguang Xu
Jay Dolan
Nicolas Pitre
Hugo Lefeuvre
Christoph Hellwig
Heikki Krogerus
Greg Kroah-Hartman
Alexander Shiyan
Richard Guy Briggs