[PATCH v6 3/3] scsi: ufs: core: Set shutting_down in ufshcd_wl_poweroff()

[HOYOUNG SEO]

ufshcd_wl_shutdown() sets hba->shutting_down under host_sem before it
suspends the device, so that ufshcd_err_handling_should_stop() makes the
error handler return instead of recovering the HBA while it is being shut
down.

ufshcd_wl_poweroff(), which is used for hibernation, also suspends the
device with UFS_SHUTDOWN_PM but neither holds host_sem nor sets
hba->shutting_down. An error handler that runs in the meantime can reset
the link concurrently with __ufshcd_wl_suspend().

Set hba->shutting_down in ufshcd_wl_poweroff() in the same way as
ufshcd_wl_shutdown() does.

Signed-off-by: HOYOUNG SEO <hy50.seo@xxxxxxxxxxx>
---
 drivers/ufs/core/ufshcd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 95beb95bb036..a52d6ccfa56b 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -11583,6 +11583,10 @@ static int ufshcd_wl_poweroff(struct device *dev)
 	struct scsi_device *sdev = to_scsi_device(dev);
 	struct ufs_hba *hba = shost_priv(sdev->host);
 
+	down(&hba->host_sem);
+	hba->shutting_down = true;
+	up(&hba->host_sem);
+
 	__ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM);
 	return 0;
 }
-- 
2.34.1