CVS commit: src/sys/dev/pad

["Nia Alarie" <nia%netbsd.org@localhost>]

Module Name:    src
Committed By:   nia
Date:           Tue Jun  8 09:09:29 UTC 2021

Modified Files:
        src/sys/dev/pad: pad.c

Log Message:
pad(4): run the callout if the buffer is saturated instead of returning

reverts to the same behavior as in -8 and -9. prevents immediate failures
and device timeouts if there's a slight delay in the buffer being
consumed.

this is reproducible with the example in the man page that uses
ffmpeg to record the output of audioplay:

$ ffmpeg -f s16le -ar 44100 -ac 2 -i /dev/pad0 output.wav
$ audioplay -d /dev/audio1 input.wav

if output.wav already exists, ffmpeg will prompt for confirmation
to overwrite as soon as audioplay starts, causing a noticable delay,
followed by a write failure that causes audioplay to immediately
exit.


To generate a diff of this commit:
cvs rdiff -u -r1.65 -r1.66 src/sys/dev/pad/pad.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.