This is a note to let you know that I've just added the patch titled
scsi: ufs: core: Correct ufshcd_shutdown() flow
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-ufs-core-correct-ufshcd_shutdown-flow.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 00511d2abf5708ad05dd5d1c36adb2468d274698 Mon Sep 17 00:00:00 2001
From: Peter Wang <peter.wang@xxxxxxxxxxxx>
Date: Wed, 27 Jul 2022 11:05:26 +0800
Subject: scsi: ufs: core: Correct ufshcd_shutdown() flow
From: Peter Wang <peter.wang@xxxxxxxxxxxx>
commit 00511d2abf5708ad05dd5d1c36adb2468d274698 upstream.
After ufshcd_wl_shutdown() set device power off and link off,
ufshcd_shutdown() could turn off clock/power. Also remove
pm_runtime_get_sync.
The reason why it is safe to remove pm_runtime_get_sync() is because:
- ufshcd_wl_shutdown() -> pm_runtime_get_sync() will resume hba->dev too.
- device resume(turn on clk/power) is not required, even if device is in
RPM_SUSPENDED.
Link: https://lore.kernel.org/r/20220727030526.31022-1-peter.wang@xxxxxxxxxxxx
Fixes: b294ff3e3449 ("scsi: ufs: core: Enable power management for wlun")
Cc: <stable@xxxxxxxxxxxxxxx> # 5.15.x
Reviewed-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
Signed-off-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -9239,12 +9239,8 @@ EXPORT_SYMBOL(ufshcd_runtime_resume);
int ufshcd_shutdown(struct ufs_hba *hba)
{
if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba))
- goto out;
+ ufshcd_suspend(hba);
- pm_runtime_get_sync(hba->dev);
-
- ufshcd_suspend(hba);
-out:
hba->is_powered = false;
/* allow force shutdown even in case of errors */
return 0;
Patches currently in stable-queue which might be from peter.wang@xxxxxxxxxxxx are
queue-5.15/scsi-ufs-core-correct-ufshcd_shutdown-flow.patch
