Patch "scsi: ufs: core: Move __ufshcd_send_uic_cmd() outside host_lock" 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: Move __ufshcd_send_uic_cmd() outside host_lock

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-move-__ufshcd_send_uic_cmd-outside-hos.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.



commit 54864ce5482879abb45d4e4cc884a51790e0dcc1
Author: Kiwoong Kim <kwmad.kim@xxxxxxxxxxx>
Date:   Mon Sep 4 10:30:44 2023 +0900

    scsi: ufs: core: Move __ufshcd_send_uic_cmd() outside host_lock
    
    [ Upstream commit 2d3f59cf868b4a2dd678a96cd49bdd91411bd59f ]
    
    __ufshcd_send_uic_cmd() is wrapped by uic_cmd_mutex and its related
    contexts are accessed within the section wrapped by uic_cmd_mutex. Thus,
    wrapping with host_lock is redundant.
    
    Signed-off-by: Kiwoong Kim <kwmad.kim@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/782ba5f26f0a96e58d85dff50751787d2d2a6b2b.1693790060.git.kwmad.kim@xxxxxxxxxxx
    Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
    Reviewed-by: Chanwoo Lee <cw9316.lee@xxxxxxxxxxx>
    Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index d00d263705e15..f48036f09eab5 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2309,7 +2309,6 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd,
 		      bool completion)
 {
 	lockdep_assert_held(&hba->uic_cmd_mutex);
-	lockdep_assert_held(hba->host->host_lock);
 
 	if (!ufshcd_ready_for_uic_cmd(hba)) {
 		dev_err(hba->dev,
@@ -2336,15 +2335,12 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd,
 int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
 {
 	int ret;
-	unsigned long flags;
 
 	ufshcd_hold(hba, false);
 	mutex_lock(&hba->uic_cmd_mutex);
 	ufshcd_add_delay_before_dme_cmd(hba);
 
-	spin_lock_irqsave(hba->host->host_lock, flags);
 	ret = __ufshcd_send_uic_cmd(hba, uic_cmd, true);
-	spin_unlock_irqrestore(hba->host->host_lock, flags);
 	if (!ret)
 		ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd);
 
@@ -3967,8 +3963,8 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd)
 		wmb();
 		reenable_intr = true;
 	}
-	ret = __ufshcd_send_uic_cmd(hba, cmd, false);
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
+	ret = __ufshcd_send_uic_cmd(hba, cmd, false);
 	if (ret) {
 		dev_err(hba->dev,
 			"pwr ctrl cmd 0x%x with mode 0x%x uic error %d\n",



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