[alsa-devel] [PATCH] ALSA: snd_usb_caiaq: fix legacy input streaming

[Daniel Mack]

Seems that nobody recently tried the input on the very first supported
sound card model, RK2. This patch fixes the byte offset to make it
running again.

Signed-off-by: Daniel Mack <daniel at caiaq.de>
---
 sound/usb/caiaq/audio.c  |    5 +++--
 sound/usb/caiaq/device.c |    2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index b144513..8f9b60c 100644
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -199,8 +199,9 @@ static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
 		dev->period_out_count[index] = BYTES_PER_SAMPLE + 1;
 		dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
 	} else {
-		dev->period_in_count[index] = BYTES_PER_SAMPLE;
-		dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE;
+		int in_pos = (dev->spec.data_alignment == 2) ? 0 : 2;
+		dev->period_in_count[index] = BYTES_PER_SAMPLE + in_pos;
+		dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE + in_pos;
 	}
 
 	if (dev->streaming)
diff --git a/sound/usb/caiaq/device.c b/sound/usb/caiaq/device.c
index 2240624..0e5db71 100644
--- a/sound/usb/caiaq/device.c
+++ b/sound/usb/caiaq/device.c
@@ -35,7 +35,7 @@
 #include "input.h"
 
 MODULE_AUTHOR("Daniel Mack <daniel at caiaq.de>");
-MODULE_DESCRIPTION("caiaq USB audio, version 1.3.16");
+MODULE_DESCRIPTION("caiaq USB audio, version 1.3.17");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Native Instruments, RigKontrol2},"
 			 "{Native Instruments, RigKontrol3},"
-- 
1.6.3.1