ALSA: pcm - Fix hwptr buffer-size overlap bug

The fix 79452f0 introduced another bug due to the missing offset for the overlapped hwptr. When the hwptr goes back to zero, the delta value has to be corrected with the buffer size. Otherwise this causes looping sounds. Signed-off-by: Takashi Iwai <[email protected]>
kyagi · Jul 23, 2009 · 947ca21 · 947ca21
1 parent 8935064
commit 947ca21
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
@@ -256,7 +256,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
 			delta = new_hw_ptr - hw_ptr_interrupt;
 	}
 	if (delta < 0) {
-		if (runtime->periods == 1)
+		if (runtime->periods == 1 || new_hw_ptr < old_hw_ptr)
 			delta += runtime->buffer_size;
 		if (delta < 0) {
 			hw_ptr_error(substream,