[PATCH] staging: lustre: do not ignore try_module_get() fail in obd_class_open()

[Alexey Khoroshilov]

obd_class_open() ignores error code of try_module_get(),
while it can lead to race with module unload.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
 drivers/staging/lustre/lustre/obdclass/linux/linux-module.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index 66ceab20c743..bb4bc72ddac7 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -168,8 +168,7 @@ EXPORT_SYMBOL(obd_ioctl_popdata);
 /*  opening /dev/obd */
 static int obd_class_open(struct inode *inode, struct file *file)
 {
-	try_module_get(THIS_MODULE);
-	return 0;
+	return try_module_get(THIS_MODULE);
 }
 
 /*  closing /dev/obd */
-- 
1.9.1

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