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Subject[PATCH 04/16] soundwire: cadence: handle error cases with CONFIG_UPDATE
Date
config_update() may time out or cannot be use in ClockStopMode

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/cadence_master.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 71cba2585151..4089c271305a 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -239,6 +239,11 @@ static int cdns_config_update(struct sdw_cdns *cdns)
{
int ret;

+ if (sdw_cdns_is_clock_stop(cdns)) {
+ dev_err(cdns->dev, "Cannot program MCP_CONFIG_UPDATE in ClockStopMode\n");
+ return -EINVAL;
+ }
+
ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE,
CDNS_MCP_CONFIG_UPDATE_BIT);
if (ret < 0)
--
2.20.1
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