| Message ID | f7fc9697e61bef13937c3455b20e7c855e31d6f7.1619621413.git.mchehab+huawei@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Address some issues with PM runtime at media subsystem | expand |
On Wed, 28 Apr 2021 16:51:36 +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 and avoid memory > leaks. > > While here, check if the PM runtime error was caught at open time. > > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > --- > drivers/media/platform/sh_vou.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c > index 4ac48441f22c..ca4310e26c49 100644 > --- a/drivers/media/platform/sh_vou.c > +++ b/drivers/media/platform/sh_vou.c > @@ -1133,7 +1133,11 @@ static int sh_vou_open(struct file *file) > if (v4l2_fh_is_singular_file(file) && > vou_dev->status == SH_VOU_INITIALISING) { > /* First open */ > - pm_runtime_get_sync(vou_dev->v4l2_dev.dev); > + err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev); > + if (err < 0) { > + v4l2_fh_release(file); > + goto done_open; > + } > err = sh_vou_hw_init(vou_dev); > if (err < 0) { > pm_runtime_put(vou_dev->v4l2_dev.dev);
diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c index 4ac48441f22c..ca4310e26c49 100644 --- a/drivers/media/platform/sh_vou.c +++ b/drivers/media/platform/sh_vou.c @@ -1133,7 +1133,11 @@ static int sh_vou_open(struct file *file) if (v4l2_fh_is_singular_file(file) && vou_dev->status == SH_VOU_INITIALISING) { /* First open */ - pm_runtime_get_sync(vou_dev->v4l2_dev.dev); + err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev); + if (err < 0) { + v4l2_fh_release(file); + goto done_open; + } err = sh_vou_hw_init(vou_dev); if (err < 0) { pm_runtime_put(vou_dev->v4l2_dev.dev);
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 and avoid memory leaks. While here, check if the PM runtime error was caught at open time. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> --- drivers/media/platform/sh_vou.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)