[ALSA] Remove PCM xfer_align sw params

The xfer_align sw_params parameter has never been used in a sane manner,
and no one understands what this does exactly.  The current
implementation looks also buggy because it allows write of shorter size
than xfer_align.  So, if you do partial writes, the write isn't actually
aligned at all.
Removing this parameter will make some pcm_lib_* code more readable
(and less buggy).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 0 insertions, 1 deletions

diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
index 48e4053eda12..835e320eeb4d 100644
--- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
@@ -2188,7 +2188,6 @@ struct _snd_pcm_runtime {
         struct timespec tstamp_mode;    /* mmap timestamp is updated */
         unsigned int period_step;
         unsigned int sleep_min;         /* min ticks to sleep */
-        snd_pcm_uframes_t xfer_align;   /* xfer size need to be a multiple */
         snd_pcm_uframes_t start_threshold;
         snd_pcm_uframes_t stop_threshold;
         snd_pcm_uframes_t silence_threshold; /* Silence filling happens when