ALSA: hda - Retry codec-verbs at errors
The current error-recovery scheme for the codec communication errors
doesn't work always well. Especially falling back to the
single-command mode causes the fatal problem on many systems.
In this patch, the problematic verb is re-issued again after the error
(even with polling mode) instead of the single-cmd mode. The
single-cmd mode will be used only when specified via the command
option explicitly, mainly just for testing.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 3d8bf39..1736ccb 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -174,14 +174,23 @@
unsigned int verb, unsigned int parm)
{
struct hda_bus *bus = codec->bus;
- unsigned int res;
+ unsigned int cmd, res;
+ int repeated = 0;
- res = make_codec_cmd(codec, nid, direct, verb, parm);
+ cmd = make_codec_cmd(codec, nid, direct, verb, parm);
snd_hda_power_up(codec);
mutex_lock(&bus->cmd_mutex);
- if (!bus->ops.command(bus, res))
+ again:
+ if (!bus->ops.command(bus, cmd)) {
res = bus->ops.get_response(bus);
- else
+ if (res == -1 && bus->rirb_error) {
+ if (repeated++ < 1) {
+ snd_printd(KERN_WARNING "hda_codec: "
+ "Trying verb 0x%08x again\n", cmd);
+ goto again;
+ }
+ }
+ } else
res = (unsigned int)-1;
mutex_unlock(&bus->cmd_mutex);
snd_hda_power_down(codec);