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| author | Lorenzo Bianconi <lorenzo.bianconi@redhat.com> | 2018-09-26 13:07:39 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2018-10-01 12:34:12 +0200 |
| commit | 481bb0432414f790066205fe77226b7d1877385d (patch) | |
| tree | 8c026f04e87a662253e2890408ef6313f22dc9b8 /drivers/net/wireless/mediatek/mt76/mt76x2u_init.c | |
| parent | 22509324c51404658a2a6fcd4af5ef263ae45801 (diff) | |
| download | linux-481bb0432414f790066205fe77226b7d1877385d.tar.bz2 | |
mt76: usb: make rx page_frag_cache access atomic
Add rx_page_lock spinlock in order to make rx page fragment access
atomic. This patch fixes the following crash that occasionally
occurs during module loading/unloading
BUG: unable to handle kernel paging request at ffff9f8322e19000
PGD 27ba01067 P4D 27ba01067 PUD 27ddba063 PMD 263b35063 PTE 8000000262e19061
Oops: 0003 [#1] SMP PTI
CPU: 2 PID: 1766 Comm: systemd-udevd Not tainted 4.19.0-rc5+ #6
Hardware name: ASUSTeK COMPUTER INC. ESC2000 G2/Z9PE-D8 WS, BIOS 0405 03/19/2012
RIP: 0010:__memcpy+0x12/0x20
RSP: 0018:ffffba13849b3ad8 EFLAGS: 00010246
RAX: ffff9f8322e17004 RBX: 00000000000038f0 RCX: 000000000000031f
RDX: 0000000000000000 RSI: ffffba13844cf058 RDI: ffff9f8322e18ffc
RBP: 0000000000010c6c R08: 0000000000000000 R09: 0000607ec0000000
R10: 0000000000000003 R11: 0000000000003e2e R12: ffff9f8324cd9540
R13: 0000000000000000 R14: ffffba13849b3b30 R15: ffff9f8322e17000
FS: 00007fadec85b880(0000) GS:ffff9f833fa80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff9f8322e19000 CR3: 0000000263428001 CR4: 00000000000606e0
Call Trace:
mt76x02u_mcu_fw_send_data+0x16c/0x270 [mt76x02_usb]
mt76x0u_probe+0x35a/0x598 [mt76x0u]
usb_probe_interface+0x113/0x310
really_probe+0x1c8/0x400
driver_probe_device+0x5c/0x130
__driver_attach+0xec/0x110
bus_for_each_dev+0x50/0x90
bus_add_driver+0x1c0/0x280
driver_register+0x5b/0xe0
usb_register_driver+0x7c/0x140
do_one_initcall+0x44/0x19b
do_init_module+0x5a/0x210
load_module+0x175c/0x1bc0
__do_sys_finit_module+0x97/0xc0
do_syscall_64+0x3f/0xf0
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fadeb6f1809
RSP: 002b:00007ffe548f9f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007fadebdf0d89 RCX: 00007fadeb6f1809
RDX: 0000000000000000 RSI: 00007fadebdf0d89 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000560b9ef58ab0
R13: 0000560b9ef29800 R14: 0000560b9ef59040 R15: 0000000000020000
Fixes: c12128ce44b0 ("mt76: use a per rx queue page fragment cache")
Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Tested-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt76x2u_init.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x2u_init.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2u_init.c b/drivers/net/wireless/mediatek/mt76/mt76x2u_init.c index 7a9ebc8985f2..9ba029451f8a 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x2u_init.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x2u_init.c @@ -264,14 +264,14 @@ int mt76x2u_register_device(struct mt76x2_dev *dev) if (err < 0) return err; - err = mt76u_mcu_init_rx(&dev->mt76); - if (err < 0) - return err; - err = mt76u_alloc_queues(&dev->mt76); if (err < 0) goto fail; + err = mt76u_mcu_init_rx(&dev->mt76); + if (err < 0) + return err; + err = mt76x2u_init_hardware(dev); if (err < 0) goto fail; |