linux-kernel - [PATCH 3/3] staging: dgnc: Need to check for NULL of ch

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Date:	Mon, 9 May 2016 11:47:34 +0900
From:	Daeseok Youn <daeseok.youn@...il.com>
To:	lidza.louina@...il.com
Cc:	markh@...pro.net, gregkh@...uxfoundation.org,
	driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 3/3] staging: dgnc: Need to check for NULL of ch

the "ch" from brd structure could be NULL, it need to
check for NULL.

Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
---
 drivers/staging/dgnc/dgnc_neo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/dgnc/dgnc_neo.c b/drivers/staging/dgnc/dgnc_neo.c
index 9eae1a6..ba57e95 100644
--- a/drivers/staging/dgnc/dgnc_neo.c
+++ b/drivers/staging/dgnc/dgnc_neo.c
@@ -380,7 +380,7 @@ static inline void neo_parse_isr(struct dgnc_board *brd, uint port)
 	unsigned long flags;
 
 	ch = brd->channels[port];
-	if (ch->magic != DGNC_CHANNEL_MAGIC)
+	if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
 		return;
 
 	/* Here we try to figure out what caused the interrupt to happen */
-- 
2.8.2