[PATCH v2 5/8] ufs: host: mediatek: Fix shutdown/suspend race condition

[peter.wang at mediatek.com]

From: Peter Wang <peter.wang at mediatek.com>

Address a race condition between shutdown and suspend
operations in the UFS Mediatek driver. Before entering
suspend, check if a shutdown is in progress to prevent
conflicts and ensure system stability.

Signed-off-by: Peter Wang <peter.wang at mediatek.com>
---
 drivers/ufs/host/ufs-mediatek.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 2a69b4cede22..c00e62adbbda 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -2425,6 +2425,11 @@ static int ufs_mtk_system_suspend(struct device *dev)
 	struct arm_smccc_res res;
 	int ret;
 
+	if (hba->shutting_down) {
+		ret = -EBUSY;
+		goto out;
+	}
+
 	ret = ufshcd_system_suspend(dev);
 	if (ret)
 		goto out;
-- 
2.45.2