[PATCH -next] staging/lustre: fix return value check in libcfs_sock_ioctl()

[Wei Yongjun]

From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

In case of error, the function sock_alloc_file() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
---
no compile test
---
 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c
index 6f1f047..855c7e8 100644
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c
@@ -59,9 +59,9 @@ libcfs_sock_ioctl(int cmd, unsigned long arg)
 	}
 
 	sock_filp = sock_alloc_file(sock, 0, NULL);
-	if (!sock_filp) {
+	if (IS_ERR(sock_filp)) {
 		sock_release(sock);
-		rc = -ENOMEM;
+		rc = PTR_ERR(sock_filp);
 		goto out;
 	}
 

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