[ALSA] rawmidi: adjust runtime->avail when changing output buffer size

Modules: RawMidi Midlevel

When the output buffer size is changed, runtime->avail must be
adjusted to the new size; otherwise, draining of a bigger buffer would
appear to fail because avail does not reach buffer_size.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index e6ee0d813783..587ea1eb3197 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -635,6 +635,7 @@ int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
                 kfree(runtime->buffer);
                 runtime->buffer = newbuf;
                 runtime->buffer_size = params->buffer_size;
+                runtime->avail = runtime->buffer_size;
         }
         runtime->avail_min = params->avail_min;
         substream->active_sensing = !params->no_active_sensing;