diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2019-06-02 16:12:57 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-06-11 11:36:25 +0200 |
| commit | b88f4d7c3812e3f3f746895cc4475b02c530303e (patch) | |
| tree | 0926c390748d8461131328130a4532f49d113107 /sound/firewire/fireface/ff-stream.c | |
| parent | 55162d2bb0e86b2d0f87a82713b1e7ee761bf8a8 (diff) | |
ALSA: fireface: update isochronous resources when starting packet streaming after bus-reset
After bus reset, isochronous resource manager releases all of allocated
isochronous resources. The nodes to restart packet streaming should
request reallocation of the resources.
However, between the bus-reset and invocation of 'struct fw_driver.update'
handler, ALSA PCM application can detect this situation by XRUN because
the target device cancelled to transmit packets once bus-reset occurs.
Due to the above mechanism, ALSA fireface driver just stops packet
streaming in the update handler, thus pcm.prepare handler should
request the reallocation.
This commit requests the reallocation in pcm.prepare callback when
bus generation is changed.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/fireface/ff-stream.c')
| -rw-r--r-- | sound/firewire/fireface/ff-stream.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/sound/firewire/fireface/ff-stream.c b/sound/firewire/fireface/ff-stream.c index d9d1b469a8e9..4f40dfb11979 100644 --- a/sound/firewire/fireface/ff-stream.c +++ b/sound/firewire/fireface/ff-stream.c @@ -234,15 +234,12 @@ void snd_ff_stream_stop_duplex(struct snd_ff *ff) void snd_ff_stream_update_duplex(struct snd_ff *ff) { - /* The device discontinue to transfer packets. */ + // The device discontinue to transfer packets. amdtp_stream_pcm_abort(&ff->tx_stream); amdtp_stream_stop(&ff->tx_stream); amdtp_stream_pcm_abort(&ff->rx_stream); amdtp_stream_stop(&ff->rx_stream); - - fw_iso_resources_update(&ff->tx_resources); - fw_iso_resources_update(&ff->rx_resources); } void snd_ff_stream_lock_changed(struct snd_ff *ff) |