On 23-10-19, 16:06, Pierre-Louis Bossart wrote:
> Changes to the sdw_slave structure needed to solve race conditions on
> driver probe.
Can you please explain the race you have observed, it would be a very
useful to document it as well
>
> The functionality is added in the next patch.
which one..?
>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
> ---
> include/linux/soundwire/sdw.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
> index 688b40e65c89..a381a596212b 100644
> --- a/include/linux/soundwire/sdw.h
> +++ b/include/linux/soundwire/sdw.h
> @@ -545,6 +545,10 @@ struct sdw_slave_ops {
> * @node: node for bus list
> * @port_ready: Port ready completion flag for each Slave port
> * @dev_num: Device Number assigned by Bus
> + * @probed: boolean tracking driver state
> + * @probe_complete: completion utility to control potential races
> + * on startup between driver probe/initialization and SoundWire
> + * Slave state changes/imp-def interrupts
> */
> struct sdw_slave {
> struct sdw_slave_id id;
> @@ -559,6 +563,8 @@ struct sdw_slave {
> struct list_head node;
> struct completion *port_ready;
> u16 dev_num;
> + bool probed;
> + struct completion probe_complete;
> };
>
> #define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)
> --
> 2.20.1
--
~Vinod
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