ALSA: au88x0: Give comment for vortex_wtdma_bufshift() issue
The check of the return value from vortex_wtdma_bufshft() in
vortex_interrupt() is useless as it executes no code. Actually the
return value is intentionally ignored because the delta calculation
for wavetable doesn't work always correctly. For avoiding the
confusion, a comment is added and the superfluous if () is removed.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/au88x0/au88x0_core.c b/sound/pci/au88x0/au88x0_core.c
index 525f881..2698abf 100644
--- a/sound/pci/au88x0/au88x0_core.c
+++ b/sound/pci/au88x0/au88x0_core.c
@@ -2461,7 +2461,12 @@
#ifndef CHIP_AU8810
for (i = 0; i < NR_WT; i++) {
if (vortex->dma_wt[i].fifo_status == FIFO_START) {
- if (vortex_wtdma_bufshift(vortex, i)) ;
+ /* FIXME: we ignore the return value from
+ * vortex_wtdma_bufshift() below as the delta
+ * calculation seems not working for wavetable
+ * by some reason
+ */
+ vortex_wtdma_bufshift(vortex, i);
spin_unlock(&vortex->lock);
snd_pcm_period_elapsed(vortex->dma_wt[i].
substream);
