ALSA: firewire-motu: fix stream format for MOTU 8pre FireWire

commit fc36ef80ca2c68b2c9df06178048f08280e4334f upstream.

My previous refactoring for ALSA firewire-motu driver brought regression
to handle MOTU 8pre FireWire. The packet format is not operated correctly.

Cc: <stable@vger.kernel.org>
Fixes: dfbaa4dc11eb ("ALSA: firewire-motu: add model-specific table of chunk count")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210614083133.39753-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/firewire/motu/motu-protocol-v2.c b/sound/firewire/motu/motu-protocol-v2.c
index e59e69ab1538b17538ed951b561a4226d043702c..784073aa1026504ae2351b1bdbdea30f4182108a 100644 (file)
--- a/sound/firewire/motu/motu-protocol-v2.c
+++ b/sound/firewire/motu/motu-protocol-v2.c
@@ -353,6 +353,7 @@ const struct snd_motu_spec snd_motu_spec_8pre = {
        .protocol_version = SND_MOTU_PROTOCOL_V2,
        .flags = SND_MOTU_SPEC_RX_MIDI_2ND_Q |
                 SND_MOTU_SPEC_TX_MIDI_2ND_Q,
-       .tx_fixed_pcm_chunks = {10, 6, 0},
-       .rx_fixed_pcm_chunks = {10, 6, 0},
+       // Two dummy chunks always in the end of data block.
+       .tx_fixed_pcm_chunks = {10, 10, 0},
+       .rx_fixed_pcm_chunks = {6, 6, 0},
 };