scsi: ufs: core: Fix I/O hang that occurs when BKOPS fails in W-LUN s…

…uspend

Even when urgent BKOPS fails, the consumer will get stuck in runtime
suspend status. Like commit 1a5665f ("scsi: ufs: core: WLUN suspend
SSU/enter hibern8 fail recovery"), trigger the error handler and return
-EBUSY to break the suspend.

Fixes: b294ff3 ("scsi: ufs: core: Enable power management for wlun")
Signed-off-by: Keoseong Park <keosung.park@samsung.com>
Link: https://lore.kernel.org/r/20230425031721epcms2p5d4de65616478c967d466626e20c42a3a@epcms2p5
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/ufs/core/ufshcd.c

@@ -9459,8 +9459,16 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 			 * that performance might be impacted.
 			 */
 			ret = ufshcd_urgent_bkops(hba);
-			if (ret)
+			if (ret) {
+				/*
+				 * If return err in suspend flow, IO will hang.
+				 * Trigger error handler and break suspend for
+				 * error recovery.
+				 */
+				ufshcd_force_error_recovery(hba);
+				ret = -EBUSY;
 				goto enable_scaling;
+			}
 		} else {
 			/* make sure that auto bkops is disabled */
 			ufshcd_disable_auto_bkops(hba);