Patch "scsi: ufs: core: Correct ufshcd_shutdown() flow" has been added to the 5.15-stable tree

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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



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