staging: dgnc: Need to check for NULL of ch

PATCH New Daeseok Youn 1 participant 1 message May 9, 2016

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Daeseok Youn

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2016-05-09 02:47 UTC #0 lore raw

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 <[email protected]>

---
 drivers/staging/dgnc/dgnc_neo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

drivers/staging/dgnc/dgnc_neo.c +1 -1

index 9eae1a6..ba57e95 100644
@@ -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 */

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2.8.2