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 3b89c9d4aa404e48f7f5e95c545652c40ad13127..14a6a100fcdb016d82a5e9b7fb558fad459b9cb7 100644 (file)
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -9745,7 +9745,10 @@ 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;
        }