| Message ID | dd3294f2d2777d41a27b4244f077f440df49a408.1620207353.git.mchehab+huawei@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix some PM runtime issues at the media subsystem | expand |
On Wed, 5 May 2021 11:41:51 +0200 Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote: > The pm_runtime_get_sync() internally increments the > dev->power.usage_count without decrementing it, even on errors. > Replace it by the new pm_runtime_resume_and_get(), introduced by: > commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") > in order to properly decrement the usage counter, avoiding > a potential PM usage counter leak. > > Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com> > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> (I'll do tags per patch as there are some open ones and it would be odd to say - "excluding xxxx" in reply to the cover letter) > --- > drivers/staging/media/rkvdec/rkvdec.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c > index d821661d30f3..8c17615f3a7a 100644 > --- a/drivers/staging/media/rkvdec/rkvdec.c > +++ b/drivers/staging/media/rkvdec/rkvdec.c > @@ -658,7 +658,7 @@ static void rkvdec_device_run(void *priv) > if (WARN_ON(!desc)) > return; > > - ret = pm_runtime_get_sync(rkvdec->dev); > + ret = pm_runtime_resume_and_get(rkvdec->dev); > if (ret < 0) { > rkvdec_job_finish_no_pm(ctx, VB2_BUF_STATE_ERROR); > return;
diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c index d821661d30f3..8c17615f3a7a 100644 --- a/drivers/staging/media/rkvdec/rkvdec.c +++ b/drivers/staging/media/rkvdec/rkvdec.c @@ -658,7 +658,7 @@ static void rkvdec_device_run(void *priv) if (WARN_ON(!desc)) return; - ret = pm_runtime_get_sync(rkvdec->dev); + ret = pm_runtime_resume_and_get(rkvdec->dev); if (ret < 0) { rkvdec_job_finish_no_pm(ctx, VB2_BUF_STATE_ERROR); return;
The pm_runtime_get_sync() internally increments the dev->power.usage_count without decrementing it, even on errors. Replace it by the new pm_runtime_resume_and_get(), introduced by: commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter") in order to properly decrement the usage counter, avoiding a potential PM usage counter leak. Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> --- drivers/staging/media/rkvdec/rkvdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)