[PATCH 5.14 092/432] scsi: ufs: Use DECLARE_COMPLETION_ONSTACK() where appropriate

[Greg Kroah-Hartman]

From: Bart Van Assche <bvanassche@xxxxxxx>

[ Upstream commit 8a686f26eaa4b8a5c494b6b69e8a97815e3ffb82 ]

>From Documentation/scheduler/completion.rst: "When a completion is declared
as a local variable within a function, then the initialization should
always use DECLARE_COMPLETION_ONSTACK() explicitly, not just to make
lockdep happy, but also to make it clear that limited scope had been
considered and is intentional."

Link: https://lore.kernel.org/r/20210722033439.26550-6-bvanassche@xxxxxxx
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
Cc: Can Guo <cang@xxxxxxxxxxxxxx>
Cc: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
Cc: Avri Altman <avri.altman@xxxxxxx>
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>
Reviewed-by: Bean Huo <beanhuo@xxxxxxxxxx>
Reviewed-by: Daejun Park <daejun7.park@xxxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/ufs/ufshcd.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 179227180961..0fe559ddc789 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2949,11 +2949,11 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
 		enum dev_cmd_type cmd_type, int timeout)
 {
 	struct request_queue *q = hba->cmd_queue;
+	DECLARE_COMPLETION_ONSTACK(wait);
 	struct request *req;
 	struct ufshcd_lrb *lrbp;
 	int err;
 	int tag;
-	struct completion wait;
 
 	down_read(&hba->clk_scaling_lock);
 
@@ -2978,7 +2978,6 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
 		goto out;
 	}
 
-	init_completion(&wait);
 	lrbp = &hba->lrb[tag];
 	WARN_ON(lrbp->cmd);
 	err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag);
@@ -3985,14 +3984,13 @@ EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr);
  */
 static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd)
 {
-	struct completion uic_async_done;
+	DECLARE_COMPLETION_ONSTACK(uic_async_done);
 	unsigned long flags;
 	u8 status;
 	int ret;
 	bool reenable_intr = false;
 
 	mutex_lock(&hba->uic_cmd_mutex);
-	init_completion(&uic_async_done);
 	ufshcd_add_delay_before_dme_cmd(hba);
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
@@ -6665,11 +6663,11 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 					enum query_opcode desc_op)
 {
 	struct request_queue *q = hba->cmd_queue;
+	DECLARE_COMPLETION_ONSTACK(wait);
 	struct request *req;
 	struct ufshcd_lrb *lrbp;
 	int err = 0;
 	int tag;
-	struct completion wait;
 	u8 upiu_flags;
 
 	down_read(&hba->clk_scaling_lock);
@@ -6687,7 +6685,6 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 		goto out;
 	}
 
-	init_completion(&wait);
 	lrbp = &hba->lrb[tag];
 	WARN_ON(lrbp->cmd);
 	lrbp->cmd = NULL;
-- 
2.30.2