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

Even when urgent BKOPS fails, the consumer will get stuck in runtime
suspend status. Like commit 1a5665fc8d7a ("scsi: ufs: core: WLUN suspend
SSU/enter hibern8 fail recovery"), trigger the error handler and return
-EBUSY to break the suspend.

Fixes: b294ff3e3449 ("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>

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 17d7bb8..45fd374 100644 (file)
--- a/drivers/ufs/core/ufshcd.c
+++ b/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);