From: YueHaibing <yuehaibing@huawei.com>
Date: Wed, 6 Mar 2019 11:46:14 +0000 (+0800)
Subject: ray_cs: Check return value of pcmcia_register_driver
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=444efbde32816a950c1749582f2e9241e3d5ee80;p=openwrt%2Fstaging%2Fblogic.git

ray_cs: Check return value of pcmcia_register_driver

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@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---

diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 44a943d18b84..d5616592fc19 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);