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path: root/drivers/isdn/hardware/mISDN/hfcsusb.c
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Diffstat (limited to 'drivers/isdn/hardware/mISDN/hfcsusb.c')
-rw-r--r--drivers/isdn/hardware/mISDN/hfcsusb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c
index 60233873463..8cde2a0538a 100644
--- a/drivers/isdn/hardware/mISDN/hfcsusb.c
+++ b/drivers/isdn/hardware/mISDN/hfcsusb.c
@@ -486,7 +486,7 @@ open_bchannel(struct hfcsusb *hw, 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;