mISDN: Implement MISDN_CTRL_FILL_EMPTY for more drivers

MISDN_CTRL_FILL_EMPTY is a meachanism to send a fixed value (normally silence)
as long no data from upper layers is available. It can be used when recording
voice messages or with unidirectional protocols.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 2ac2d7a25a9f..28c99c623bcd 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -268,6 +268,7 @@ dsp_fill_empty(struct dsp *dsp)
         }
         cq.op = MISDN_CTRL_FILL_EMPTY;
         cq.p1 = 1;
+        cq.p2 = dsp_silence;
         if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) {
                 printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
                        __func__);