Re: [alsa-devel] [PATCH v4 07/15] soundwire: slave: move uevent handling to slave

Pierre-Louis Bossart
2019-12-13T22:16:21Z

On 12/13/19 10:11 AM, Greg KH wrote:
> On Fri, Dec 13, 2019 at 09:11:27AM -0600, Pierre-Louis Bossart wrote:
>> On 12/13/19 1:22 AM, Greg KH wrote:
>>> On Thu, Dec 12, 2019 at 11:04:01PM -0600, Pierre-Louis Bossart wrote:
>>>> Currently the code deals with uevents at the bus level, but we only care
>>>> for Slave events
>>>
>>> What does this mean? I can't understand it, can you please provide more
>>> information on what you are doing here?
>>
>> In the earlier versions of the patch, the code looks like this and there was
>> an open on what to do with a master-specific event.
>>
>> static int sdw_uevent(struct device *dev, struct kobj_uevent_env *env)
>> {
>> + struct sdw_master_device *md;
>> struct sdw_slave *slave;
>> char modalias[32];
>>
>> - if (is_sdw_slave(dev)) {
>> + if (is_sdw_md(dev)) {
>> + md = to_sdw_master_device(dev);
>> + /* TODO: do we need to call add_uevent_var() ? */
>> + } else if (is_sdw_slave(dev)) {
>> slave = to_sdw_slave_device(dev);
>> +
>> + sdw_slave_modalias(slave, modalias, sizeof(modalias));
>> +
>> + if (add_uevent_var(env, "MODALIAS=%s", modalias))
>> + return -ENOMEM;
>> } else {
>> dev_warn(dev, "uevent for unknown Soundwire type\n");
>> return -EINVAL;
>> }
>>
>> Vinod suggested this was not needed and suggested the code for uevents be
>> moved to be slave-specific, which is what this patch does.
>
> Then describe it really really well in the changelog text. We have no
> rememberance of prior conversations when looking at commits in the tree
> in the future.

ok, will do.