[PATCH] soundwire: bus: filter out more -EDATA errors on clock stop

[PATCH] soundwire: bus: filter out more -EDATA errors on clock stop

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

We've added quite a few filters to avoid throwing errors if a Device
does not respond to commands during the clock stop sequences, but we
missed one.

This will lead to an isolated message
[ 6115.294412] soundwire sdw-master-1: SDW_SCP_STAT bread failed:-61

The callers already filter this error code, so there's no point in
keeping it at the lower level.

Since this is a recoverable error, make this dev_err() conditional and
only log cases with Command Failed.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/bus.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index 3e6d4addac2f..278a4fbdb88d 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -896,7 +896,8 @@ static int sdw_bus_wait_for_clk_prep_deprep(struct sdw_bus *bus, u16 dev_num)
 	do {
 		val = sdw_bread_no_pm(bus, dev_num, SDW_SCP_STAT);
 		if (val < 0) {
-			dev_err(bus->dev, "SDW_SCP_STAT bread failed:%d\n", val);
+			if (val != -ENODATA)
+				dev_err(bus->dev, "SDW_SCP_STAT bread failed:%d\n", val);
 			return val;
 		}
 		val &= SDW_SCP_STAT_CLK_STP_NF;
-- 
2.17.1

Re: [PATCH] soundwire: bus: filter out more -EDATA errors on clock stop

[Vinod Koul]

On 14-07-21, 09:42, Bard Liao wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> 
> We've added quite a few filters to avoid throwing errors if a Device
> does not respond to commands during the clock stop sequences, but we
> missed one.
> 
> This will lead to an isolated message
> [ 6115.294412] soundwire sdw-master-1: SDW_SCP_STAT bread failed:-61
> 
> The callers already filter this error code, so there's no point in
> keeping it at the lower level.
> 
> Since this is a recoverable error, make this dev_err() conditional and
> only log cases with Command Failed.

Applied, thanks

-- 
~Vinod