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staging: line6: fix playback urb transfer buffer calculation 

The playback urb transfer buffer calculation does not factor in
LINE6_ISO_PACKETS.  Buffer memory is organized like this in the driver:

  Buffer 0                 Buffer 1                 ...
  [Packet 0, Packet 1, ...][Packet 0, Packet 1, ...][Packet 0, ...]

However, we're lucky that LINE6_ISO_PACKETS is currently defined as 1 so
this patch does not change any behavior.  It's still worth including
this fix in case the LINE6_ISO_PACKETS value is changed in the future.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Stefan Hajnoczi 2011-12-10 02:12:28 +01:00 committed by Greg Kroah-Hartman
parent 60c01a9778
commit 2f637ee42d
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/line6/playback.c
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@ -192,7 +192,7 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
urb_frames = urb_size / bytes_per_frame;
urb_out->transfer_buffer =
line6pcm->buffer_out +
line6pcm->max_packet_size * line6pcm->index_out;
LINE6_ISO_PACKETS * line6pcm->max_packet_size * line6pcm->index_out;
urb_out->transfer_buffer_length = urb_size;
urb_out->context = line6pcm;