From 91d12c485b8949cce6c13ab641147c5bc86ce8b9 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Wed, 21 Oct 2009 09:12:26 +0200 Subject: sound: rawmidi: fix opened substreams count The substream_opened field is to count the number of opened substreams, not the number of times that any substreams have been opened. Furthermore, all substreams being opened does not imply that the next open would fail, due to the possibility of O_APPEND. With this wrong check, opening a substream multiple times would succeed only if the device had more unopened substreams. Signed-off-by: Clemens Ladisch Signed-off-by: Takashi Iwai --- sound/core/rawmidi.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 4e26563431c8..818b1299ed91 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -242,8 +242,6 @@ static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, return -ENXIO; if (subdevice >= 0 && subdevice >= s->substream_count) return -ENODEV; - if (s->substream_opened >= s->substream_count) - return -EAGAIN; list_for_each_entry(substream, &s->substreams, list) { if (substream->opened) { @@ -280,9 +278,9 @@ static int open_substream(struct snd_rawmidi *rmidi, substream->active_sensing = 0; if (mode & SNDRV_RAWMIDI_LFLG_APPEND) substream->append = 1; + rmidi->streams[substream->stream].substream_opened++; } substream->use_count++; - rmidi->streams[substream->stream].substream_opened++; return 0; } @@ -466,7 +464,6 @@ static void close_substream(struct snd_rawmidi *rmidi, struct snd_rawmidi_substream *substream, int cleanup) { - rmidi->streams[substream->stream].substream_opened--; if (--substream->use_count) return; @@ -491,6 +488,7 @@ static void close_substream(struct snd_rawmidi *rmidi, snd_rawmidi_runtime_free(substream); substream->opened = 0; substream->append = 0; + rmidi->streams[substream->stream].substream_opened--; } static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) -- cgit v1.2.3