VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: YueHaibing <yuehaibing@huawei.com> 2019-03-06 19:56:58 +0800 committer: Kalle Valo <kvalo@codeaurora.org> 2019-04-25 19:39:34 +0300 commit: b2c01aab9646ed8ffb7c549afe55d5349c482425 parent: 3b6edcb3fffeb9af00a7e0d21636ba2d95ef9987
Commit Summary:
ssb: Fix possible NULL pointer dereference in ssb_host_pcmcia_exit
Diffstat:
1 file changed, 6 insertions, 2 deletions
diff --git a/drivers/ssb/bridge_pcmcia_80211.c b/drivers/ssb/bridge_pcmcia_80211.c
index f51f150307df..ffa379efff83 100644
--- a/drivers/ssb/bridge_pcmcia_80211.c
+++ b/drivers/ssb/bridge_pcmcia_80211.c
@@ -113,16 +113,21 @@ static struct pcmcia_driver ssb_host_pcmcia_driver = {
 	.resume		= ssb_host_pcmcia_resume,
 };
 
+static int pcmcia_init_failed;
+
 /*
  * These are not module init/exit functions!
  * The module_pcmcia_driver() helper cannot be used here.
  */
 int ssb_host_pcmcia_init(void)
 {
-	return pcmcia_register_driver(&ssb_host_pcmcia_driver);
+	pcmcia_init_failed = pcmcia_register_driver(&ssb_host_pcmcia_driver);
+
+	return pcmcia_init_failed;
 }
 
 void ssb_host_pcmcia_exit(void)
 {
-	pcmcia_unregister_driver(&ssb_host_pcmcia_driver);
+	if (!pcmcia_init_failed)
+		pcmcia_unregister_driver(&ssb_host_pcmcia_driver);
 }