Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-mmc

[powerpc.git] / drivers / isdn / gigaset / isocdata.c

diff --git a/drivers/isdn/gigaset/isocdata.c b/drivers/isdn/gigaset/isocdata.c
index 2f16287..8667daa 100644 (file)
--- a/drivers/isdn/gigaset/isocdata.c
+++ b/drivers/isdn/gigaset/isocdata.c
@@ -990,6 +990,13 @@ void gigaset_isoc_input(struct inbuf_t *inbuf)
 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb)
 {
        int len = skb->len;
+       unsigned long flags;
+
+       spin_lock_irqsave(&bcs->cs->lock, flags);
+       if (!bcs->cs->connected) {
+               spin_unlock_irqrestore(&bcs->cs->lock, flags);
+               return -ENODEV;
+       }
 
        skb_queue_tail(&bcs->squeue, skb);
        gig_dbg(DEBUG_ISO, "%s: skb queued, qlen=%d",
@@ -997,6 +1004,7 @@ int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb)
 
        /* tasklet submits URB if necessary */
        tasklet_schedule(&bcs->hw.bas->sent_tasklet);
+       spin_unlock_irqrestore(&bcs->cs->lock, flags);
 
        return len;     /* ok so far */
 }