scsi: ufs: core: WLUN suspend dev/link state error recovery

[ Upstream commit 6bc5e70b1c792b31b497e48b4668a9a2909aca0d ]

When wl suspend error occurs, for example BKOP or SSU timeout, the host
triggers an error handler and returns -EBUSY to break the wl suspend
process.  However, it is possible for the runtime PM to enter wl suspend
again before the error handler has finished, and return -EINVAL because the
device is in an error state. To address this, ensure that the rumtime PM
waits for the error handler to finish, or trigger the error handler in such
cases, because returning -EINVAL can cause the I/O to hang.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20240329015036.15707-1-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index ee9119b708f018ec6cd6f0967e43c70e11a67c6d..8005373e20bae054054fda161f7e038107bd27da 100644 (file)
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -9547,7 +9547,10 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 
        /* UFS device & link must be active before we enter in this function */
        if (!ufshcd_is_ufs_dev_active(hba) || !ufshcd_is_link_active(hba)) {
-               ret = -EINVAL;
+               /*  Wait err handler finish or trigger err recovery */
+               if (!ufshcd_eh_in_progress(hba))
+                       ufshcd_force_error_recovery(hba);
+               ret = -EBUSY;
                goto enable_scaling;
        }