scsi: ufs: ufs-mediatek: Disable HCI before HW reset

MediaTek ufshci needs to be disabled before HW reset to avoid potential
issues.

Link: https://lore.kernel.org/r/20210528033624.12170-3-alice.chao@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Alice.Chao <alice.chao@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index 9912e20..bbe0596 100644 (file)
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -844,6 +844,9 @@ static int ufs_mtk_device_reset(struct ufs_hba *hba)
 {
        struct arm_smccc_res res;
 
+       /* disable hba before device reset */
+       ufshcd_hba_stop(hba);
+
        ufs_mtk_device_reset_ctrl(0, res);
 
        /*