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

[Daeseok Youn]

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

Signed-off-by: Daeseok Youn <daeseok.y...@gmail.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