GuillaumeHemmen/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2024-11-01 04:53:36 +01:00
Code Issues Projects Releases Packages Wiki Activity

scsi: ufs: core: Fix another deadlock during RTC update

Browse source 
If ufshcd_rtc_work calls ufshcd_rpm_put_sync() and the pm's usage_count
is 0, we will enter the runtime suspend callback.  However, the runtime
suspend callback will wait to flush ufshcd_rtc_work, causing a deadlock.

Replace ufshcd_rpm_put_sync() with ufshcd_rpm_put() to avoid the
deadlock.

Fixes: 6bf999e0eb ("scsi: ufs: core: Add UFS RTC support")
Cc: stable@vger.kernel.org #6.11.x
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20241024015453.21684-1-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2024-10-24 09:54:53 +08:00 committed by Martin K. Petersen
parent d28d17a845
commit cb7e509c4e
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/ufs/core/ufshcd.c
View file

@ -8219,7 +8219,7 @@ static void ufshcd_update_rtc(struct ufs_hba *hba)
err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR, QUERY_ATTR_IDN_SECONDS_PASSED,
0, 0, &val);
ufshcd_rpm_put_sync(hba);
ufshcd_rpm_put(hba);
if (err)
dev_err(hba->dev, "%s: Failed to update rtc %d\n", __func__, err);