linux-kernel - [PATCH 02/19] soundwire: stream: add slave runtime to list earlier

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Message-Id: <20220126011715.28204-3-yung-chuan.liao@linux.intel.com>
Date:   Wed, 26 Jan 2022 09:16:58 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, srinivas.kandagatla@...aro.org,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        bard.liao@...el.com
Subject: [PATCH 02/19] soundwire: stream: add slave runtime to list earlier

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

sdw_config_stream() only verifies the compatibility between
information provided by the Slave driver and the stream configuration.

There is no problem if we add the slave runtime to the list earlier.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/stream.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index a30d0fb4871b..a75d3576bfcf 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1373,21 +1373,12 @@ int sdw_stream_add_slave(struct sdw_slave *slave,
 		ret = -ENOMEM;
 		goto stream_error;
 	}
-
-	ret = sdw_config_stream(&slave->dev, stream, stream_config, true);
-	if (ret) {
-		/*
-		 * sdw_release_master_stream will release s_rt in slave_rt_list in
-		 * stream_error case, but s_rt is only added to slave_rt_list
-		 * when sdw_config_stream is successful, so free s_rt explicitly
-		 * when sdw_config_stream is failed.
-		 */
-		kfree(s_rt);
-		goto stream_error;
-	}
-
 	list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list);
 
+	ret = sdw_config_stream(&slave->dev, stream, stream_config, true);
+	if (ret)
+		goto stream_error;
+
 	ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports);
 	if (ret)
 		goto stream_error;
-- 
2.17.1