提交 91d12c48 编写于 作者: C Clemens Ladisch 提交者: Takashi Iwai

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: NClemens Ladisch <clemens@ladisch.de>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
上级 3f225c07
......@@ -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)
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册