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path: root/drivers/isdn/hardware/mISDN/mISDNisar.c
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Diffstat (limited to 'drivers/isdn/hardware/mISDN/mISDNisar.c')
-rw-r--r--drivers/isdn/hardware/mISDN/mISDNisar.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/isdn/hardware/mISDN/mISDNisar.c b/drivers/isdn/hardware/mISDN/mISDNisar.c
index 10446ab404b5..9a6da6edcfa8 100644
--- a/drivers/isdn/hardware/mISDN/mISDNisar.c
+++ b/drivers/isdn/hardware/mISDN/mISDNisar.c
@@ -1670,7 +1670,7 @@ isar_open(struct isar_hw *isar, struct channel_req *rq)
{
struct bchannel *bch;
- if (rq->adr.channel > 2)
+ if (rq->adr.channel == 0 || rq->adr.channel > 2)
return -EINVAL;
if (rq->protocol == ISDN_P_NONE)
return -EINVAL;