On Wed, 28 Apr 2021 16:51:44 +0200
Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> wrote:
> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
> added pm_runtime_resume_and_get() in order to automatically handle
> dev->power.usage_count decrement on errors.
>
> Use the new API, in order to cleanup the error check logic.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Could add that pm_runtime_put() should have been pm_runtime_put_noidle()
inorder to not potentially result in a call to runtime suspend when
we never resumed in the first place.
Otherwise reasonable cleanup.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> ---
> drivers/staging/media/ipu3/ipu3.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/staging/media/ipu3/ipu3.c b/drivers/staging/media/ipu3/ipu3.c
> index ee1bba6bdcac..8e1e9e46e604 100644
> --- a/drivers/staging/media/ipu3/ipu3.c
> +++ b/drivers/staging/media/ipu3/ipu3.c
> @@ -392,10 +392,9 @@ int imgu_s_stream(struct imgu_device *imgu, int enable)
> }
>
> /* Set Power */
> - r = pm_runtime_get_sync(dev);
> + r = pm_runtime_resume_and_get(dev);
> if (r < 0) {
> dev_err(dev, "failed to set imgu power\n");
> - pm_runtime_put(dev);
> return r;
> }
>
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