[PATCH v2] ufs: core: Fix runtime suspend error deadlock

[peter.wang at mediatek.com]

From: Peter Wang <peter.wang at mediatek.com>

Resolve the deadlock issue during runtime suspend when an
error triggers the error handler. Prevent the deadlock
by checking pm_op_in_progress and performing a quick recovery.
This approach ensures that the error handler does not wait
indefinitely for runtime PM to resume, allowing runtime
suspend to proceed smoothly.

Signed-off-by: Peter Wang <peter.wang at mediatek.com>
Suggested-by: Bart Van Assche <bvanassche at acm.org>
Tested-by: Bart Van Assche <bvanassche at acm.org>
---
 drivers/ufs/core/ufshcd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 88a0e9289ca6..8185a7791923 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -6681,6 +6681,14 @@ static void ufshcd_err_handler(struct work_struct *work)
 	}
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 
+	ufshcd_rpm_get_noresume(hba);
+	if (hba->pm_op_in_progress) {
+		ufshcd_link_recovery(hba);
+		ufshcd_rpm_put(hba);
+		return;
+	}
+	ufshcd_rpm_put(hba);
+
 	ufshcd_err_handling_prepare(hba);
 
 	spin_lock_irqsave(hba->host->host_lock, flags);
-- 
2.45.2