ALSA: snd_usb_caiaq: fix legacy input streaming

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@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 4 insertions, 3 deletions

diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index b14451342166..8f9b60c5d74c 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 22406245a98b..0e5db719de24 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@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},"