* [PATCH] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe
@ 2022-01-05 12:04 Miaoqian Lin
2022-01-06 11:57 ` Dave Stevenson
0 siblings, 1 reply; 6+ messages in thread
From: Miaoqian Lin @ 2022-01-05 12:04 UTC (permalink / raw)
Cc: linmq006, Emma Anholt, David Airlie, Daniel Vetter, Eric Anholt,
dri-devel, linux-kernel
The pm_runtime_enable will increase power disable depth.
If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable().
Fixes: 57692c9 ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
drivers/gpu/drm/v3d/v3d_drv.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index bd46396a1ae0..4f293aa733b8 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -300,6 +300,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
v3d_gem_destroy(drm);
dma_free:
dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
+pm_disable:
+ pm_runtime_disable(dev);
return ret;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe
2022-01-05 12:04 [PATCH] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe Miaoqian Lin
@ 2022-01-06 11:57 ` Dave Stevenson
2022-01-06 12:46 ` [PATCH v2] " Miaoqian Lin
0 siblings, 1 reply; 6+ messages in thread
From: Dave Stevenson @ 2022-01-06 11:57 UTC (permalink / raw)
To: Miaoqian Lin
Cc: Emma Anholt, David Airlie, LKML, DRI Development, Eric Anholt
Thanks for the patch.
On Wed, 5 Jan 2022 at 12:04, Miaoqian Lin <linmq006@gmail.com> wrote:
>
> The pm_runtime_enable will increase power disable depth.
> If the probe fails, we should use pm_runtime_disable() to balance
> pm_runtime_enable().
>
> Fixes: 57692c9 ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
> ---
> drivers/gpu/drm/v3d/v3d_drv.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
> index bd46396a1ae0..4f293aa733b8 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.c
> +++ b/drivers/gpu/drm/v3d/v3d_drv.c
> @@ -300,6 +300,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
> v3d_gem_destroy(drm);
> dma_free:
> dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
> +pm_disable:
> + pm_runtime_disable(dev);
The dma_alloc_wc is done before the pm_runtime_enable, so the cleanup
should be in the opposite order.
Functionally it makes minimal difference in this case as
pm_runtime_enable can't fail, but could cause confusion/errors should
any other initialisation step be added between the two.
The pm_disable label is also unused so not necessary, however if
reversing the order then renaming dma_free to pm_disable would be
sensible.
Dave
> return ret;
> }
>
> --
> 2.17.1
>
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH v2] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe
2022-01-06 11:57 ` Dave Stevenson
@ 2022-01-06 12:46 ` Miaoqian Lin
2022-01-07 11:03 ` Dave Stevenson
2022-01-09 17:48 ` Melissa Wen
0 siblings, 2 replies; 6+ messages in thread
From: Miaoqian Lin @ 2022-01-06 12:46 UTC (permalink / raw)
To: dave.stevenson; +Cc: airlied, dri-devel, emma, eric, linmq006, linux-kernel
The pm_runtime_enable will increase power disable depth.
If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable().
Fixes: 57692c9 ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
Changes in v2
- put pm_runtime_disable before dma_free_wc
- rename dma_free to pm_disable
---
drivers/gpu/drm/v3d/v3d_drv.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index bd46396a1ae0..7d500dd5314e 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -282,7 +282,7 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
ret = v3d_gem_init(drm);
if (ret)
- goto dma_free;
+ goto pm_disable;
ret = v3d_irq_init(v3d);
if (ret)
@@ -298,7 +298,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
v3d_irq_disable(v3d);
gem_destroy:
v3d_gem_destroy(drm);
-dma_free:
+pm_disable:
+ pm_runtime_disable(dev);
dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
return ret;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH v2] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe
2022-01-06 12:46 ` [PATCH v2] " Miaoqian Lin
@ 2022-01-07 11:03 ` Dave Stevenson
2022-01-09 17:48 ` Melissa Wen
1 sibling, 0 replies; 6+ messages in thread
From: Dave Stevenson @ 2022-01-07 11:03 UTC (permalink / raw)
To: Miaoqian Lin
Cc: David Airlie, DRI Development, Eric Anholt, Eric Anholt, LKML
On Thu, 6 Jan 2022 at 12:47, Miaoqian Lin <linmq006@gmail.com> wrote:
>
> The pm_runtime_enable will increase power disable depth.
> If the probe fails, we should use pm_runtime_disable() to balance
> pm_runtime_enable().
>
> Fixes: 57692c9 ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Thanks for the update - that looks good to me.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
> ---
> Changes in v2
> - put pm_runtime_disable before dma_free_wc
> - rename dma_free to pm_disable
> ---
> drivers/gpu/drm/v3d/v3d_drv.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
> index bd46396a1ae0..7d500dd5314e 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.c
> +++ b/drivers/gpu/drm/v3d/v3d_drv.c
> @@ -282,7 +282,7 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
>
> ret = v3d_gem_init(drm);
> if (ret)
> - goto dma_free;
> + goto pm_disable;
>
> ret = v3d_irq_init(v3d);
> if (ret)
> @@ -298,7 +298,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
> v3d_irq_disable(v3d);
> gem_destroy:
> v3d_gem_destroy(drm);
> -dma_free:
> +pm_disable:
> + pm_runtime_disable(dev);
> dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
> return ret;
> }
> --
> 2.17.1
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH v2] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe
2022-01-06 12:46 ` [PATCH v2] " Miaoqian Lin
2022-01-07 11:03 ` Dave Stevenson
@ 2022-01-09 17:48 ` Melissa Wen
2022-01-10 3:05 ` Miaoqian Lin
1 sibling, 1 reply; 6+ messages in thread
From: Melissa Wen @ 2022-01-09 17:48 UTC (permalink / raw)
To: Miaoqian Lin; +Cc: dave.stevenson, emma, airlied, linux-kernel, dri-devel, eric
[-- Attachment #1: Type: text/plain, Size: 1418 bytes --]
On 01/06, Miaoqian Lin wrote:
> The pm_runtime_enable will increase power disable depth.
> If the probe fails, we should use pm_runtime_disable() to balance
> pm_runtime_enable().
>
> Fixes: 57692c9 ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
> ---
> Changes in v2
> - put pm_runtime_disable before dma_free_wc
> - rename dma_free to pm_disable
> ---
> drivers/gpu/drm/v3d/v3d_drv.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
> index bd46396a1ae0..7d500dd5314e 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.c
> +++ b/drivers/gpu/drm/v3d/v3d_drv.c
> @@ -282,7 +282,7 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
>
> ret = v3d_gem_init(drm);
> if (ret)
> - goto dma_free;
> + goto pm_disable;
>
> ret = v3d_irq_init(v3d);
> if (ret)
> @@ -298,7 +298,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
> v3d_irq_disable(v3d);
> gem_destroy:
> v3d_gem_destroy(drm);
> -dma_free:
> +pm_disable:
> + pm_runtime_disable(dev);
Hi,
I see this pm_runtime_disable balancing is also missing for
v3d_platform_drm_remove(), right?
BR,
Melissa
> dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
> return ret;
> }
> --
> 2.17.1
>
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH v2] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe
2022-01-09 17:48 ` Melissa Wen
@ 2022-01-10 3:05 ` Miaoqian Lin
0 siblings, 0 replies; 6+ messages in thread
From: Miaoqian Lin @ 2022-01-10 3:05 UTC (permalink / raw)
To: Melissa Wen; +Cc: dave.stevenson, emma, airlied, linux-kernel, dri-devel, eric
Hi Melissa,
On Sun, Jan 09, 2022 at 04:48:17PM -0100, Melissa Wen wrote:
> On 01/06, Miaoqian Lin wrote:
> > The pm_runtime_enable will increase power disable depth.
> > If the probe fails, we should use pm_runtime_disable() to balance
> > pm_runtime_enable().
> >
> > if (ret)
> > - goto dma_free;
> > + goto pm_disable;
> >
> > ret = v3d_irq_init(v3d);
> > if (ret)
> > @@ -298,7 +298,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
> > v3d_irq_disable(v3d);
> > gem_destroy:
> > v3d_gem_destroy(drm);
> > -dma_free:
> > +pm_disable:
> > + pm_runtime_disable(dev);
>
> Hi,
>
> I see this pm_runtime_disable balancing is also missing for
> v3d_platform_drm_remove(), right?
>
I think, yes.
> > dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
> > return ret;
> > }
> > --
> > 2.17.1
> >
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2022-01-10 3:05 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2022-01-05 12:04 [PATCH] drm/v3d: Fix PM disable depth imbalance in v3d_platform_drm_probe Miaoqian Lin
2022-01-06 11:57 ` Dave Stevenson
2022-01-06 12:46 ` [PATCH v2] " Miaoqian Lin
2022-01-07 11:03 ` Dave Stevenson
2022-01-09 17:48 ` Melissa Wen
2022-01-10 3:05 ` Miaoqian Lin
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