[PATCH 4.9 051/129] ALSA: hda - Show the fatal CORB/RIRB error more clearly

From: Greg Kroah-Hartman
Date: Thu Oct 03 2019 - 12:02:38 EST


From: Takashi Iwai <tiwai@xxxxxxx>

[ Upstream commit dd65f7e19c6961ba6a69f7c925021b7a270cb950 ]

The last fallback of CORB/RIRB communication error recovery is to turn
on the single command mode, and this last resort usually means that
something is really screwed up. Instead of a normal dev_err(), show
the error more clearly with dev_WARN() with the caller stack trace.

Also, show the bus-reset fallback also as an error, too.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/pci/hda/hda_controller.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 85dbe2420248d..c5e82329348b3 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -866,10 +866,13 @@ static int azx_rirb_get_response(struct hdac_bus *bus, unsigned int addr,
*/
if (hbus->allow_bus_reset && !hbus->response_reset && !hbus->in_reset) {
hbus->response_reset = 1;
+ dev_err(chip->card->dev,
+ "No response from codec, resetting bus: last cmd=0x%08x\n",
+ bus->last_cmd[addr]);
return -EAGAIN; /* give a chance to retry */
}

- dev_err(chip->card->dev,
+ dev_WARN(chip->card->dev,
"azx_get_response timeout, switching to single_cmd mode: last cmd=0x%08x\n",
bus->last_cmd[addr]);
chip->single_cmd = 1;
--
2.20.1