mISDN: Fixed missing spin lock on pipeline process

Need to protect the complete pipeline.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 1c49368e0a9..621ea9bc7c2 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -704,6 +704,8 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
                         break;
                 }
 
+                spin_lock_irqsave(&dsp_lock, flags);
+
                 /* decrypt if enabled */
                 if (dsp->bf_enable)
                         dsp_bf_decrypt(dsp, skb->data, skb->len);
@@ -741,11 +743,11 @@ dsp_function(struct mISDNchannel *ch,  struct sk_buff *skb)
                         }
                 }
                 /* we need to process receive data if software */
-                spin_lock_irqsave(&dsp_lock, flags);
                 if (dsp->pcm_slot_tx < 0 && dsp->pcm_slot_rx < 0) {
                         /* process data from card at cmx */
                         dsp_cmx_receive(dsp, skb);
                 }
+
                 spin_unlock_irqrestore(&dsp_lock, flags);
 
                 if (dsp->rx_disabled) {