Messages in this thread | | | Subject | Re: [PATCH v3 06/79] media: exynos-gsc: don't resume at remove time | From | Sylwester Nawrocki <> | Date | Tue, 27 Apr 2021 13:21:32 +0200 |
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On 27.04.2021 12:25, Mauro Carvalho Chehab wrote: > Calling pm_runtime_get_sync() at driver's removal time is not > needed, as this will resume PM runtime. Also, the PM runtime > code at pm_runtime_disable() already calls it, if it detects > the need. > > So, simplify the code by getting rid of that. > > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> > --- > drivers/media/platform/exynos-gsc/gsc-core.c | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c > index 9f41c2e7097a..70e86cdc1012 100644 > --- a/drivers/media/platform/exynos-gsc/gsc-core.c > +++ b/drivers/media/platform/exynos-gsc/gsc-core.c > @@ -1210,8 +1210,6 @@ static int gsc_remove(struct platform_device *pdev) > struct gsc_dev *gsc = platform_get_drvdata(pdev); > int i; > > - pm_runtime_get_sync(&pdev->dev); > - > gsc_unregister_m2m_device(gsc); > v4l2_device_unregister(&gsc->v4l2_dev); > > @@ -1219,7 +1217,6 @@ static int gsc_remove(struct platform_device *pdev) > for (i = 0; i < gsc->num_clocks; i++) > clk_disable_unprepare(gsc->clock[i]); > > - pm_runtime_put_noidle(&pdev->dev); > pm_runtime_disable(&pdev->dev);
This will result in unbalanced clk_disable_unprepare() calls when the device is not runtime PM active at the time of gsc_remove() call. I think we need to first disable runtime PM for the device and then disable the clocks only when pm_runtime_status_suspended(&pdev->dev) returns false.
Thanks, Sylwester
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