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| author | Clemens Ladisch <clemens@ladisch.de> | 2009-10-21 09:10:16 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-10 16:21:30 +0100 |
| commit | 16fb109644b5644e42ececeff644514de6f4bd03 (patch) | |
| tree | 8f05be8292e049627ac800b4bff301e0a7e84f05 | |
| parent | 8579d2d7779d7ff41ea2a0183015e0e5038f1043 (diff) | |
| download | linux-3.10-16fb109644b5644e42ececeff644514de6f4bd03.tar.gz linux-3.10-16fb109644b5644e42ececeff644514de6f4bd03.tar.bz2 linux-3.10-16fb109644b5644e42ececeff644514de6f4bd03.zip | |
sound: rawmidi: fix checking of O_APPEND when opening MIDI device
Commit 9a1b64caac82aa02cb74587ffc798e6f42c6170a in 2.6.30 dropped the
check that a substream must already have been opened with O_APPEND to be
able to open it a second time.
This would make it possible for a substream to be switched to append
mode, which would mean that non-atomic writes would fail unexpectedly.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/core/rawmidi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 3071e6f5801..091405385e1 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -248,7 +248,8 @@ static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, list_for_each_entry(substream, &s->substreams, list) { if (substream->opened) { if (stream == SNDRV_RAWMIDI_STREAM_INPUT || - !(mode & SNDRV_RAWMIDI_LFLG_APPEND)) + !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || + !substream->append) continue; } if (subdevice < 0 || subdevice == substream->number) { |