[RESEND,v3,1/2] ufs: make __ufshcd_send_uic_cmd not wrapped by host_lock

Commit Message

Kiwoong Kim Sept. 4, 2023, 1:30 a.m. UTC

__ufshcd_send_uic_cmd is wrapped uic_cmd_mutex and
its related contexts are accessed within the period wrappted
by uic_cmd_mutex. Thus, wrapping with host_lock is
redundant.

Signed-off-by: Kiwoong Kim <[e-mail]>
Reviewed-by: Bart Van Assche <[e-mail]>
---
 drivers/ufs/core/ufshcd.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

Comments

Chanwoo Lee Sept. 4, 2023, 8:23 a.m. UTC | #1

> __ufshcd_send_uic_cmd is wrapped uic_cmd_mutex and
> its related contexts are accessed within the period wrappted
> by uic_cmd_mutex. Thus, wrapping with host_lock is
> redundant.
> 
> Signed-off-by: Kiwoong Kim <[e-mail]>
> Reviewed-by: Bart Van Assche <[e-mail]>
> ---

Reviewed-by: Junwoo Lee <[e-mail]>
Reviewed-by: Chanwoo Lee <[e-mail]>

Patch

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 27e1a49..6300ed6 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -2414,7 +2414,6 @@  __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,
@@ -2441,7 +2440,6 @@  __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;
 
 	if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
 		return 0;
@@ -2450,9 +2448,7 @@  int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
 	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);
 
@@ -4161,8 +4157,8 @@  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",