From 0d57c54455ece1014806ffeaa42d0504b3fb8248 Mon Sep 17 00:00:00 2001
From: Shiyong Li <a22381@motorola.com>
Date: Fri, 8 Dec 2017 17:38:24 -0800
Subject: [PATCH] fs/exfat: do error check for d_splice_alias return

This patch adds error check in case a defect exFAT SD cards is inserted.

Change-Id: I37f6b8716abd556908aad72b18fcc7ac5719766e
Signed-off-by: Min Shi <e13386@motorola.com>
Signed-off-by: Shiyong Li <a22381@motorola.com>
Reviewed-on: https://gerrit.mot.com/1102184
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Igor Kovalenko <igork@motorola.com>
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1276885
Reviewed-by: Hua Tan <tanhua1@motorola.com>
---
 fs/exfat/exfat_super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/exfat/exfat_super.c b/fs/exfat/exfat_super.c
index 2e041cdede7e..24159668960f 100644
--- a/fs/exfat/exfat_super.c
+++ b/fs/exfat/exfat_super.c
@@ -873,7 +873,7 @@ out:
 	}
 #else
 	dentry = d_splice_alias(inode, dentry);
-	if (dentry)
+	if (dentry && !IS_ERR(dentry))
 		dentry->d_time = dentry->d_parent->d_inode->i_version;
 #endif
 	DPRINTK("exfat_lookup exited 2\n");
-- 
2.20.1