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-rw-r--r--drivers/firewire/core-card.c35
-rw-r--r--drivers/firewire/core-cdev.c8
-rw-r--r--drivers/firewire/core-device.c18
-rw-r--r--drivers/firewire/core-topology.c9
-rw-r--r--drivers/firewire/core-transaction.c30
-rw-r--r--drivers/firewire/ohci.c65
-rw-r--r--drivers/firewire/sbp2.c13
7 files changed, 130 insertions, 48 deletions
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 54be88167c60..d446a7262941 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -429,7 +429,23 @@ static void bm_work(struct work_struct *work)
*/
card->bm_generation = generation;
- if (root_device == NULL) {
+ if (card->gap_count == 0) {
+ /*
+ * If self IDs have inconsistent gap counts, do a
+ * bus reset ASAP. The config rom read might never
+ * complete, so don't wait for it. However, still
+ * send a PHY configuration packet prior to the
+ * bus reset. The PHY configuration packet might
+ * fail, but 1394-2008 8.4.5.2 explicitly permits
+ * it in this case, so it should be safe to try.
+ */
+ new_root_id = local_id;
+ /*
+ * We must always send a bus reset if the gap count
+ * is inconsistent, so bypass the 5-reset limit.
+ */
+ card->bm_retries = 0;
+ } else if (root_device == NULL) {
/*
* Either link_on is false, or we failed to read the
* config rom. In either case, pick another root.
@@ -484,7 +500,19 @@ static void bm_work(struct work_struct *work)
fw_notice(card, "phy config: new root=%x, gap_count=%d\n",
new_root_id, gap_count);
fw_send_phy_config(card, new_root_id, generation, gap_count);
- reset_bus(card, true);
+ /*
+ * Where possible, use a short bus reset to minimize
+ * disruption to isochronous transfers. But in the event
+ * of a gap count inconsistency, use a long bus reset.
+ *
+ * As noted in 1394a 8.4.6.2, nodes on a mixed 1394/1394a bus
+ * may set different gap counts after a bus reset. On a mixed
+ * 1394/1394a bus, a short bus reset can get doubled. Some
+ * nodes may treat the double reset as one bus reset and others
+ * may treat it as two, causing a gap count inconsistency
+ * again. Using a long bus reset prevents this.
+ */
+ reset_bus(card, card->gap_count != 0);
/* Will allocate broadcast channel after the reset. */
goto out;
}
@@ -668,6 +696,7 @@ EXPORT_SYMBOL_GPL(fw_card_release);
void fw_core_remove_card(struct fw_card *card)
{
struct fw_card_driver dummy_driver = dummy_driver_template;
+ unsigned long flags;
card->driver->update_phy_reg(card, 4,
PHY_LINK_ACTIVE | PHY_CONTENDER, 0);
@@ -682,7 +711,9 @@ void fw_core_remove_card(struct fw_card *card)
dummy_driver.stop_iso = card->driver->stop_iso;
card->driver = &dummy_driver;
+ spin_lock_irqsave(&card->lock, flags);
fw_destroy_nodes(card);
+ spin_unlock_irqrestore(&card->lock, flags);
/* Wait for all users, especially device workqueue jobs, to finish. */
fw_card_put(card);
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index 1da7ba18d399..4fe36d549d61 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -818,8 +818,10 @@ static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
r = container_of(resource, struct inbound_transaction_resource,
resource);
- if (is_fcp_request(r->request))
+ if (is_fcp_request(r->request)) {
+ kfree(r->data);
goto out;
+ }
if (a->length != fw_get_response_length(r->request)) {
ret = -EINVAL;
@@ -1482,6 +1484,7 @@ static void outbound_phy_packet_callback(struct fw_packet *packet,
{
struct outbound_phy_packet_event *e =
container_of(packet, struct outbound_phy_packet_event, p);
+ struct client *e_client;
switch (status) {
/* expected: */
@@ -1498,9 +1501,10 @@ static void outbound_phy_packet_callback(struct fw_packet *packet,
}
e->phy_packet.data[0] = packet->timestamp;
+ e_client = e->client;
queue_event(e->client, &e->event, &e->phy_packet,
sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
- client_put(e->client);
+ client_put(e_client);
}
static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index b785e936244f..82aacff0c4f9 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -100,10 +100,9 @@ static int textual_leaf_to_string(const u32 *block, char *buf, size_t size)
* @buf: where to put the string
* @size: size of @buf, in bytes
*
- * The string is taken from a minimal ASCII text descriptor leaf after
- * the immediate entry with @key. The string is zero-terminated.
- * An overlong string is silently truncated such that it and the
- * zero byte fit into @size.
+ * The string is taken from a minimal ASCII text descriptor leaf just after the entry with the
+ * @key. The string is zero-terminated. An overlong string is silently truncated such that it
+ * and the zero byte fit into @size.
*
* Returns strlen(buf) or a negative error code.
*/
@@ -719,14 +718,11 @@ static void create_units(struct fw_device *device)
fw_unit_attributes,
&unit->attribute_group);
- if (device_register(&unit->device) < 0)
- goto skip_unit;
-
fw_device_get(device);
- continue;
-
- skip_unit:
- kfree(unit);
+ if (device_register(&unit->device) < 0) {
+ put_device(&unit->device);
+ continue;
+ }
}
}
diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index 94a13fca8267..5999dce11fc8 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -374,16 +374,13 @@ static void report_found_node(struct fw_card *card,
card->bm_retries = 0;
}
+/* Must be called with card->lock held */
void fw_destroy_nodes(struct fw_card *card)
{
- unsigned long flags;
-
- spin_lock_irqsave(&card->lock, flags);
card->color++;
if (card->local_node != NULL)
for_each_fw_node(card, card->local_node, report_lost_node);
card->local_node = NULL;
- spin_unlock_irqrestore(&card->lock, flags);
}
static void move_tree(struct fw_node *node0, struct fw_node *node1, int port)
@@ -509,6 +506,8 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
struct fw_node *local_node;
unsigned long flags;
+ spin_lock_irqsave(&card->lock, flags);
+
/*
* If the selfID buffer is not the immediate successor of the
* previously processed one, we cannot reliably compare the
@@ -520,8 +519,6 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
card->bm_retries = 0;
}
- spin_lock_irqsave(&card->lock, flags);
-
card->broadcast_channel_allocated = card->broadcast_channel_auto_allocated;
card->node_id = node_id;
/*
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index 404a035f104d..78574789a187 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -73,24 +73,25 @@ static int try_cancel_split_timeout(struct fw_transaction *t)
static int close_transaction(struct fw_transaction *transaction,
struct fw_card *card, int rcode)
{
- struct fw_transaction *t;
+ struct fw_transaction *t = NULL, *iter;
unsigned long flags;
spin_lock_irqsave(&card->lock, flags);
- list_for_each_entry(t, &card->transaction_list, link) {
- if (t == transaction) {
- if (!try_cancel_split_timeout(t)) {
+ list_for_each_entry(iter, &card->transaction_list, link) {
+ if (iter == transaction) {
+ if (!try_cancel_split_timeout(iter)) {
spin_unlock_irqrestore(&card->lock, flags);
goto timed_out;
}
- list_del_init(&t->link);
- card->tlabel_mask &= ~(1ULL << t->tlabel);
+ list_del_init(&iter->link);
+ card->tlabel_mask &= ~(1ULL << iter->tlabel);
+ t = iter;
break;
}
}
spin_unlock_irqrestore(&card->lock, flags);
- if (&t->link != &card->transaction_list) {
+ if (t) {
t->callback(card, rcode, NULL, 0, t->callback_data);
return 0;
}
@@ -935,7 +936,7 @@ EXPORT_SYMBOL(fw_core_handle_request);
void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
{
- struct fw_transaction *t;
+ struct fw_transaction *t = NULL, *iter;
unsigned long flags;
u32 *data;
size_t data_length;
@@ -947,20 +948,21 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
rcode = HEADER_GET_RCODE(p->header[1]);
spin_lock_irqsave(&card->lock, flags);
- list_for_each_entry(t, &card->transaction_list, link) {
- if (t->node_id == source && t->tlabel == tlabel) {
- if (!try_cancel_split_timeout(t)) {
+ list_for_each_entry(iter, &card->transaction_list, link) {
+ if (iter->node_id == source && iter->tlabel == tlabel) {
+ if (!try_cancel_split_timeout(iter)) {
spin_unlock_irqrestore(&card->lock, flags);
goto timed_out;
}
- list_del_init(&t->link);
- card->tlabel_mask &= ~(1ULL << t->tlabel);
+ list_del_init(&iter->link);
+ card->tlabel_mask &= ~(1ULL << iter->tlabel);
+ t = iter;
break;
}
}
spin_unlock_irqrestore(&card->lock, flags);
- if (&t->link == &card->transaction_list) {
+ if (!t) {
timed_out:
fw_notice(card, "unsolicited response (source %x, tlabel %x)\n",
source, tlabel);
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 522f3addb5bd..6603f13f5de9 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -279,6 +279,51 @@ static char ohci_driver_name[] = KBUILD_MODNAME;
#define QUIRK_TI_SLLZ059 0x20
#define QUIRK_IR_WAKE 0x40
+// On PCI Express Root Complex in any type of AMD Ryzen machine, VIA VT6306/6307/6308 with Asmedia
+// ASM1083/1085 brings an inconvenience that the read accesses to 'Isochronous Cycle Timer' register
+// (at offset 0xf0 in PCI I/O space) often causes unexpected system reboot. The mechanism is not
+// clear, since the read access to the other registers is enough safe; e.g. 'Node ID' register,
+// while it is probable due to detection of any type of PCIe error.
+#define QUIRK_REBOOT_BY_CYCLE_TIMER_READ 0x80000000
+
+#if IS_ENABLED(CONFIG_X86)
+
+static bool has_reboot_by_cycle_timer_read_quirk(const struct fw_ohci *ohci)
+{
+ return !!(ohci->quirks & QUIRK_REBOOT_BY_CYCLE_TIMER_READ);
+}
+
+#define PCI_DEVICE_ID_ASMEDIA_ASM108X 0x1080
+
+static bool detect_vt630x_with_asm1083_on_amd_ryzen_machine(const struct pci_dev *pdev)
+{
+ const struct pci_dev *pcie_to_pci_bridge;
+
+ // Detect any type of AMD Ryzen machine.
+ if (!static_cpu_has(X86_FEATURE_ZEN))
+ return false;
+
+ // Detect VIA VT6306/6307/6308.
+ if (pdev->vendor != PCI_VENDOR_ID_VIA)
+ return false;
+ if (pdev->device != PCI_DEVICE_ID_VIA_VT630X)
+ return false;
+
+ // Detect Asmedia ASM1083/1085.
+ pcie_to_pci_bridge = pdev->bus->self;
+ if (pcie_to_pci_bridge->vendor != PCI_VENDOR_ID_ASMEDIA)
+ return false;
+ if (pcie_to_pci_bridge->device != PCI_DEVICE_ID_ASMEDIA_ASM108X)
+ return false;
+
+ return true;
+}
+
+#else
+#define has_reboot_by_cycle_timer_read_quirk(ohci) false
+#define detect_vt630x_with_asm1083_on_amd_ryzen_machine(pdev) false
+#endif
+
/* In case of multiple matches in ohci_quirks[], only the first one is used. */
static const struct {
unsigned short vendor, device, revision, flags;
@@ -1099,7 +1144,7 @@ static void context_tasklet(unsigned long data)
static int context_add_buffer(struct context *ctx)
{
struct descriptor_buffer *desc;
- dma_addr_t uninitialized_var(bus_addr);
+ dma_addr_t bus_addr;
int offset;
/*
@@ -1289,7 +1334,7 @@ static int at_context_queue_packet(struct context *ctx,
struct fw_packet *packet)
{
struct fw_ohci *ohci = ctx->ohci;
- dma_addr_t d_bus, uninitialized_var(payload_bus);
+ dma_addr_t d_bus, payload_bus;
struct driver_data *driver_data;
struct descriptor *d, *last;
__le32 *header;
@@ -1717,6 +1762,9 @@ static u32 get_cycle_time(struct fw_ohci *ohci)
s32 diff01, diff12;
int i;
+ if (has_reboot_by_cycle_timer_read_quirk(ohci))
+ return 0;
+
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
if (ohci->quirks & QUIRK_CYCLE_TIMER) {
@@ -2445,7 +2493,7 @@ static int ohci_set_config_rom(struct fw_card *card,
{
struct fw_ohci *ohci;
__be32 *next_config_rom;
- dma_addr_t uninitialized_var(next_config_rom_bus);
+ dma_addr_t next_config_rom_bus;
ohci = fw_ohci(card);
@@ -2933,10 +2981,10 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
int type, int channel, size_t header_size)
{
struct fw_ohci *ohci = fw_ohci(card);
- struct iso_context *uninitialized_var(ctx);
- descriptor_callback_t uninitialized_var(callback);
- u64 *uninitialized_var(channels);
- u32 *uninitialized_var(mask), uninitialized_var(regs);
+ struct iso_context *ctx;
+ descriptor_callback_t callback;
+ u64 *channels;
+ u32 *mask, regs;
int index, ret = -EBUSY;
spin_lock_irq(&ohci->lock);
@@ -3619,6 +3667,9 @@ static int pci_probe(struct pci_dev *dev,
if (param_quirks)
ohci->quirks = param_quirks;
+ if (detect_vt630x_with_asm1083_on_amd_ryzen_machine(dev))
+ ohci->quirks |= QUIRK_REBOOT_BY_CYCLE_TIMER_READ;
+
/*
* Because dma_alloc_coherent() allocates at least one page,
* we save space by using a common buffer for the AR request/
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c
index 4d5054211550..2ceed9287435 100644
--- a/drivers/firewire/sbp2.c
+++ b/drivers/firewire/sbp2.c
@@ -408,7 +408,7 @@ static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
void *payload, size_t length, void *callback_data)
{
struct sbp2_logical_unit *lu = callback_data;
- struct sbp2_orb *orb;
+ struct sbp2_orb *orb = NULL, *iter;
struct sbp2_status status;
unsigned long flags;
@@ -433,17 +433,18 @@ static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
/* Lookup the orb corresponding to this status write. */
spin_lock_irqsave(&lu->tgt->lock, flags);
- list_for_each_entry(orb, &lu->orb_list, link) {
+ list_for_each_entry(iter, &lu->orb_list, link) {
if (STATUS_GET_ORB_HIGH(status) == 0 &&
- STATUS_GET_ORB_LOW(status) == orb->request_bus) {
- orb->rcode = RCODE_COMPLETE;
- list_del(&orb->link);
+ STATUS_GET_ORB_LOW(status) == iter->request_bus) {
+ iter->rcode = RCODE_COMPLETE;
+ list_del(&iter->link);
+ orb = iter;
break;
}
}
spin_unlock_irqrestore(&lu->tgt->lock, flags);
- if (&orb->link != &lu->orb_list) {
+ if (orb) {
orb->callback(orb, &status);
kref_put(&orb->kref, free_orb); /* orb callback reference */
} else {
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-19 17:29:17 +0000