Commit f2bb614b authored by Takashi Iwai's avatar Takashi Iwai

ALSA: line6: Clear prev_fbuf and prev_fsize properly

Clearing prev_fsize in line6_pcm_acquire() is pretty racy.
This can be called at any time while the stream is being played.
Rather better to clear prev_fbuf and prev_fsize at the proper place
like the stream stop for capture, and just after copying the monitor /
impulse data inside the spinlock.
Tested-by: default avatarChris Rorvick <chris@rorvick.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3d3ae445
......@@ -171,8 +171,6 @@ int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int channels)
flags_final = 0;
line6pcm->prev_fbuf = NULL;
if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_BUFFER)) {
err = line6_alloc_stream_buffer(line6pcm, &line6pcm->in);
if (err < 0)
......@@ -193,7 +191,6 @@ int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int channels)
}
line6pcm->in.count = 0;
line6pcm->prev_fsize = 0;
err = line6_submit_audio_in_all_urbs(line6pcm);
if (err < 0)
......@@ -248,8 +245,11 @@ int line6_pcm_release(struct snd_line6_pcm *line6pcm, int channels)
flags_new = flags_old & ~channels;
} while (cmpxchg(&line6pcm->flags, flags_old, flags_new) != flags_old);
if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_STREAM))
if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_STREAM)) {
line6_unlink_audio_urbs(line6pcm, &line6pcm->in);
line6pcm->prev_fbuf = NULL;
line6pcm->prev_fsize = 0;
}
if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_BUFFER)) {
line6_wait_clear_audio_urbs(line6pcm, &line6pcm->in);
......
......@@ -166,9 +166,7 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
struct usb_iso_packet_descriptor *fout =
&urb_out->iso_frame_desc[i];
if (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM)
fsize = line6pcm->prev_fsize;
if (fsize == 0) {
int n;
......@@ -263,6 +261,8 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
line6pcm->volume_monitor,
bytes_per_frame);
}
line6pcm->prev_fbuf = NULL;
line6pcm->prev_fsize = 0;
}
spin_unlock(&line6pcm->in.lock);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment