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soundwire: Fix duplicate stream state assignment 

For a SoundWire stream it is expected that a Slave is added to the
stream before Master is added.

So, move the stream state to CONFIGURED after the first Slave is
added and remove the stream state assignment for Master add.
Along with these changes, add additional comments to explain the same.

Signed-off-by: Shreyas NC <shreyas.nc@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
hifive-unleashed-5.1
Shreyas NC 2018-07-27 14:44:08 +05:30 committed by Vinod Koul
parent 5b394b2ddf
commit 0aebe40bae
1 changed files with 10 additions and 2 deletions
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12
drivers/soundwire/stream.c
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@ -1123,8 +1123,6 @@ int sdw_stream_add_master(struct sdw_bus *bus,
if (ret)
goto stream_error;
stream->state = SDW_STREAM_CONFIGURED;
stream_error:
sdw_release_master_stream(stream);
error:
@ -1141,6 +1139,10 @@ EXPORT_SYMBOL(sdw_stream_add_master);
* @stream: SoundWire stream
* @port_config: Port configuration for audio stream
* @num_ports: Number of ports
*
* It is expected that Slave is added before adding Master
* to the Stream.
*
*/
int sdw_stream_add_slave(struct sdw_slave *slave,
struct sdw_stream_config *stream_config,
@ -1186,6 +1188,12 @@ int sdw_stream_add_slave(struct sdw_slave *slave,
if (ret)
goto stream_error;
/*
* Change stream state to CONFIGURED on first Slave add.
* Bus is not aware of number of Slave(s) in a stream at this
* point so cannot depend on all Slave(s) to be added in order to
* change stream state to CONFIGURED.
*/
stream->state = SDW_STREAM_CONFIGURED;
goto error;