On Fri, 15 Apr 2011, Guennadi Liakhovetski wrote:
> Restore the initial RPM_SUSPENDED runtime pm status, when disabling,
> otherwise the following enable will not function. This happens, e.g.,
> when unloading and reloading drivers.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
> Cc: Simon Horman <horms@xxxxxxxxxxxx>
> Cc: Magnus Damm <damm@xxxxxxxxxxxxx>
> ---
>
> No, I do not claim to understand the thousand of states, flags, and
> counters, this just happens to fix the problem for me. Feel free to make a
> correct solution out of this.
>
> drivers/base/power/runtime.c | 4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
> index 3172c60..83d6898 100644
> --- a/drivers/base/power/runtime.c
> +++ b/drivers/base/power/runtime.c
> @@ -1012,8 +1012,10 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
> pm_runtime_put_noidle(dev);
> }
>
> - if (!dev->power.disable_depth++)
> + if (!dev->power.disable_depth++) {
> __pm_runtime_barrier(dev);
> + dev->power.runtime_status = RPM_SUSPENDED;
> + }
>
> out:
> spin_unlock_irq(&dev->power.lock);
This certainly doesn't look right. Can you explain in more detail the
problem you are trying to solve?
Alan Stern
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