mISDN: Make clearing B-channel a common function

Clearing B-channel is needed in every driver, so it makes sense
to have it as common function.

Signed-off-by: Karsten Keil <keil@b1-systems.de>

1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/isdn/mISDN/hwchannel.c b/drivers/isdn/mISDN/hwchannel.c
index 0481a0cdf6db..e8049be552aa 100644
--- a/drivers/isdn/mISDN/hwchannel.c
+++ b/drivers/isdn/mISDN/hwchannel.c
@@ -114,13 +114,14 @@ mISDN_freedchannel(struct dchannel *ch)
 }
 EXPORT_SYMBOL(mISDN_freedchannel);
 
-int
-mISDN_freebchannel(struct bchannel *ch)
+void
+mISDN_clear_bchannel(struct bchannel *ch)
 {
         if (ch->tx_skb) {
                 dev_kfree_skb(ch->tx_skb);
                 ch->tx_skb = NULL;
         }
+        ch->tx_idx = 0;
         if (ch->rx_skb) {
                 dev_kfree_skb(ch->rx_skb);
                 ch->rx_skb = NULL;
@@ -129,6 +130,16 @@ mISDN_freebchannel(struct bchannel *ch)
                 dev_kfree_skb(ch->next_skb);
                 ch->next_skb = NULL;
         }
+        test_and_clear_bit(FLG_TX_BUSY, &ch->Flags);
+        test_and_clear_bit(FLG_TX_NEXT, &ch->Flags);
+        test_and_clear_bit(FLG_ACTIVE, &ch->Flags);
+}
+EXPORT_SYMBOL(mISDN_clear_bchannel);
+
+int
+mISDN_freebchannel(struct bchannel *ch)
+{
+        mISDN_clear_bchannel(ch);
         skb_queue_purge(&ch->rqueue);
         ch->rcount = 0;
         flush_scheduled_work();