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scsi: ufs: core: Fix runtime suspend error deadlock

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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@mediatek.com>
Suggested-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Message-Id: <20250926012940.3933367-1-peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang
2025-09-26 09:29:26 +08:00
committed by Martin K. Petersen
parent 285654d58a
commit f966e02ae5
1 changed files with 8 additions and 0 deletions
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8
drivers/ufs/core/ufshcd.c
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@@ -6673,6 +6673,14 @@ 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);