From: Peter Wang <peter.wang@mediatek.com>
Date: Wed, 24 Sep 2025 09:43:27 +0000 (+0800)
Subject: scsi: ufs: host: mediatek: Fix shutdown/suspend race condition
X-Git-Tag: v6.19-rc1~95^2~42^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=014de20bb36ba03e0e0b0a7e0a1406ab900c9fda;p=thirdparty%2Fkernel%2Flinux.git

scsi: ufs: host: mediatek: Fix shutdown/suspend race condition

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@mediatek.com>
Acked-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Link: https://patch.msgid.link/20250924094527.2992256-6-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 2a69b4cede222..c00e62adbbda8 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;