scsi: ufs: host: mediatek: Change reset sequence for improved stability

[ Upstream commit 878ed88c50bfb14d972dd3b86a1c8188c58de4e5 ]

Modify the reset sequence to ensure that the device reset pin is set low
before the host is disabled. This change enhances the stability of the
reset process by ensuring the correct order of operations.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20250811131423.3444014-10-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index ada21360aa270e963a436d225b3497acd637c0e7..82160da8ec71bee414f6b1cd159e87932b68a371 100644 (file)
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1503,11 +1503,11 @@ 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);
 
+       /* disable hba in middle of device reset */
+       ufshcd_hba_stop(hba);
+
        /*
         * The reset signal is active low. UFS devices shall detect
         * more than or equal to 1us of positive or negative RST_n