[PATCH] ray_cs: Check return value of pcmcia_register_driver

[Yue Haibing]

From: YueHaibing <yuehaibing@xxxxxxxxxx>

init_ray_cs does not check value of pcmcia_register_driver,
if it fails, there maybe cause a NULL pointer dereference in
exit_ray_cs.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/net/wireless/ray_cs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 44a943d..d561659 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -2795,6 +2795,8 @@ static int __init init_ray_cs(void)
 	rc = pcmcia_register_driver(&ray_driver);
 	pr_debug("raylink init_module register_pcmcia_driver returns 0x%x\n",
 	      rc);
+	if (rc)
+		return rc;
 
 #ifdef CONFIG_PROC_FS
 	proc_mkdir("driver/ray_cs", NULL);
-- 
2.7.0