Re: [PATCH] PM / Domains: Propagate start and restore errors during runtime resume

[Kevin Hilman]

Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx> writes:

> During runtime resume the return values of the start and restore steps
> are ignored. As a result drivers are not notified of runtime resume
> failures and can't propagate them up. Fix it by returning an error if
> either the start or restore step fails, and clean up properly in the
> error path.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> ---
>  drivers/base/power/domain.c | 20 ++++++++++++++++++--
>  1 file changed, 18 insertions(+), 2 deletions(-)
>
> This fixes an issue I've noticed with my driver's .runtime_resume() handler
> returning an error that was never propagated out of pm_runtime_get_sync().

Acked-by: Kevin Hilman <khilman@xxxxxxxxxxxx>

> A second issue then appeared. The device .runtime_error field is set to the
> error code returned by my .runtime_resume() handler, but it never reset. Any
> subsequent try to resume the device fails with -EINVAL. I'm not sure what the
> right way to solve that is, advices are welcome.

Probably setting it (back) to zero after each successful runtime_suspend
or runtime_resume is the right way.  Rafael?

Kevin