From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
We currently add the slave device to a linked list before
device_register(), and then remove it if device_register() fails.
It's not clear why this sequence was necessary, this patch moves the
linked list management to after the device_register().
Suggested-by: Keyon Jie <yang.jie@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@xxxxxxxxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
drivers/soundwire/slave.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index 112b21967c7a..0c92db2e1ddc 100644
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -65,9 +65,6 @@ int sdw_slave_add(struct sdw_bus *bus,
for (i = 0; i < SDW_MAX_PORTS; i++)
init_completion(&slave->port_ready[i]);
- mutex_lock(&bus->bus_lock);
- list_add_tail(&slave->node, &bus->slaves);
- mutex_unlock(&bus->bus_lock);
ret = device_register(&slave->dev);
if (ret) {
@@ -77,13 +74,15 @@ int sdw_slave_add(struct sdw_bus *bus,
* On err, don't free but drop ref as this will be freed
* when release method is invoked.
*/
- mutex_lock(&bus->bus_lock);
- list_del(&slave->node);
- mutex_unlock(&bus->bus_lock);
put_device(&slave->dev);
return ret;
}
+
+ mutex_lock(&bus->bus_lock);
+ list_add_tail(&slave->node, &bus->slaves);
+ mutex_unlock(&bus->bus_lock);
+
sdw_slave_debugfs_init(slave);
return ret;
--
2.17.1
