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 <khoroshi...@ispras.ru>
---
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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