mISDN: Fix HDLC DSP transmit

Fix HDLC DSP transmit (DL_DATA frames were bounced back upwards instead of
being sent down as PH_DATA frames)

Thanks to Andreas Eversberg for the fix!

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Peter Schlaile <root@asterisk.schlaile.de>
Signed-off-by: Karsten Keil <kkeil@suse.de>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 1d504ba954f5..c16cb7ac3d2a 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -867,11 +867,14 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
                 }
                 if (dsp->hdlc) {
                         /* hdlc */
-                        spin_lock_irqsave(&dsp_lock, flags);
-                        if (dsp->b_active) {
-                                skb_queue_tail(&dsp->sendq, skb);
-                                schedule_work(&dsp->workq);
+                        if (!dsp->b_active) {
+                                ret = -EIO;
+                                break;
                         }
+                        hh->prim = PH_DATA_REQ;
+                        spin_lock_irqsave(&dsp_lock, flags);
+                        skb_queue_tail(&dsp->sendq, skb);
+                        schedule_work(&dsp->workq);
                         spin_unlock_irqrestore(&dsp_lock, flags);
                         return 0;
                 }