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authorShreyas NC <shreyas.nc@intel.com>2018-07-27 14:44:08 +0530
committerVinod Koul <vkoul@kernel.org>2018-08-27 09:49:48 +0530
commit0aebe40bae6cf5652fdc3d05ecee15fbf5748194 (patch)
tree714b092b91852a748aa64c87d5962e26d0bdd242 /drivers/soundwire
parent5b394b2ddf0347bef56e50c69a58773c94343ff3 (diff)
downloadblackbird-op-linux-0aebe40bae6cf5652fdc3d05ecee15fbf5748194.tar.gz
blackbird-op-linux-0aebe40bae6cf5652fdc3d05ecee15fbf5748194.zip
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>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/stream.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 4b5e250e8615..7ba6d4d8cd03 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -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;
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