6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Seunghwan Baek <sh8267.baek@xxxxxxxxxxx>
commit 19a198b67767d952c8f3d0cf24eb3100522a8223 upstream.
There is a history of deadlock if reboot is performed at the beginning
of booting. SDEV_QUIESCE was set for all LU's scsi_devices by UFS
shutdown, and at that time the audio driver was waiting on
blk_mq_submit_bio() holding a mutex_lock while reading the fw binary.
After that, a deadlock issue occurred while audio driver shutdown was
waiting for mutex_unlock of blk_mq_submit_bio(). To solve this, set
SDEV_OFFLINE for all LUs except WLUN, so that any I/O that comes down
after a UFS shutdown will return an error.
[ 31.907781]I[0: swapper/0: 0] 1 130705007 1651079834 11289729804 0 D( 2) 3 ffffff882e208000 * init [device_shutdown]
[ 31.907793]I[0: swapper/0: 0] Mutex: 0xffffff8849a2b8b0: owner[0xffffff882e28cb00 kworker/6:0 :49]
[ 31.907806]I[0: swapper/0: 0] Call trace:
[ 31.907810]I[0: swapper/0: 0] __switch_to+0x174/0x338
[ 31.907819]I[0: swapper/0: 0] __schedule+0x5ec/0x9cc
[ 31.907826]I[0: swapper/0: 0] schedule+0x7c/0xe8
[ 31.907834]I[0: swapper/0: 0] schedule_preempt_disabled+0x24/0x40
[ 31.907842]I[0: swapper/0: 0] __mutex_lock+0x408/0xdac
[ 31.907849]I[0: swapper/0: 0] __mutex_lock_slowpath+0x14/0x24
[ 31.907858]I[0: swapper/0: 0] mutex_lock+0x40/0xec
[ 31.907866]I[0: swapper/0: 0] device_shutdown+0x108/0x280
[ 31.907875]I[0: swapper/0: 0] kernel_restart+0x4c/0x11c
[ 31.907883]I[0: swapper/0: 0] __arm64_sys_reboot+0x15c/0x280
[ 31.907890]I[0: swapper/0: 0] invoke_syscall+0x70/0x158
[ 31.907899]I[0: swapper/0: 0] el0_svc_common+0xb4/0xf4
[ 31.907909]I[0: swapper/0: 0] do_el0_svc+0x2c/0xb0
[ 31.907918]I[0: swapper/0: 0] el0_svc+0x34/0xe0
[ 31.907928]I[0: swapper/0: 0] el0t_64_sync_handler+0x68/0xb4
[ 31.907937]I[0: swapper/0: 0] el0t_64_sync+0x1a0/0x1a4
[ 31.908774]I[0: swapper/0: 0] 49 0 11960702 11236868007 0 D( 2) 6 ffffff882e28cb00 * kworker/6:0 [__bio_queue_enter]
[ 31.908783]I[0: swapper/0: 0] Call trace:
[ 31.908788]I[0: swapper/0: 0] __switch_to+0x174/0x338
[ 31.908796]I[0: swapper/0: 0] __schedule+0x5ec/0x9cc
[ 31.908803]I[0: swapper/0: 0] schedule+0x7c/0xe8
[ 31.908811]I[0: swapper/0: 0] __bio_queue_enter+0xb8/0x178
[ 31.908818]I[0: swapper/0: 0] blk_mq_submit_bio+0x194/0x67c
[ 31.908827]I[0: swapper/0: 0] __submit_bio+0xb8/0x19c
Fixes: b294ff3e3449 ("scsi: ufs: core: Enable power management for wlun")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Seunghwan Baek <sh8267.baek@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240829093913.6282-2-sh8267.baek@xxxxxxxxxxx
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ufs/core/ufshcd.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -10100,7 +10100,9 @@ static void ufshcd_wl_shutdown(struct de
shost_for_each_device(sdev, hba->host) {
if (sdev == hba->ufs_device_wlun)
continue;
- scsi_device_quiesce(sdev);
+ mutex_lock(&sdev->state_mutex);
+ scsi_device_set_state(sdev, SDEV_OFFLINE);
+ mutex_unlock(&sdev->state_mutex);
}
__ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM);
