2019-11-18 07:39:46

by Chuhong Yuan

Subject: [PATCH 1/2] dmaengine: ti: edma: add missed pm_runtime_disable

The driver forgets to call pm_runtime_disable in probe failure and
remove.
Add the calls and modify probe failure handling to fix it.

Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
Signed-off-by: Chuhong Yuan <[email protected]>
---
drivers/dma/ti/edma.c | 43 ++++++++++++++++++++++++++++---------------
1 file changed, 28 insertions(+), 15 deletions(-)

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index ba7c4f07fcd6..8be32fd9f762 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -2282,16 +2282,18 @@ static int edma_probe(struct platform_device *pdev)
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "pm_runtime_get_sync() failed\n");
- return ret;
+ goto err_disable_pm;
}

ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
- return ret;
+ goto err_disable_pm;

ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
- if (!ecc)
- return -ENOMEM;
+ if (!ecc) {
+ ret = -ENOMEM;
+ goto err_disable_pm;
+ }

ecc->dev = dev;
ecc->id = pdev->id;
@@ -2306,30 +2308,37 @@ static int edma_probe(struct platform_device *pdev)
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(dev, "no mem resource?\n");
- return -ENODEV;
+ ret = -ENODEV;
+ goto err_disable_pm;
}
}
ecc->base = devm_ioremap_resource(dev, mem);
- if (IS_ERR(ecc->base))
- return PTR_ERR(ecc->base);
+ if (IS_ERR(ecc->base)) {
+ ret = PTR_ERR(ecc->base);
+ goto err_disable_pm;
+ }

platform_set_drvdata(pdev, ecc);

/* Get eDMA3 configuration from IP */
ret = edma_setup_from_hw(dev, info, ecc);
if (ret)
- return ret;
+ goto err_disable_pm;

/* Allocate memory based on the information we got from the IP */
ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
sizeof(*ecc->slave_chans), GFP_KERNEL);
- if (!ecc->slave_chans)
- return -ENOMEM;
+ if (!ecc->slave_chans) {
+ ret = -ENOMEM;
+ goto err_disable_pm;
+ }

ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
sizeof(unsigned long), GFP_KERNEL);
- if (!ecc->slot_inuse)
- return -ENOMEM;
+ if (!ecc->slot_inuse) {
+ ret = -ENOMEM;
+ goto err_disable_pm;
+ }

ecc->default_queue = info->default_queue;

@@ -2368,7 +2377,7 @@ static int edma_probe(struct platform_device *pdev)
ecc);
if (ret) {
dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
- return ret;
+ goto err_disable_pm;
}
ecc->ccint = irq;
}
@@ -2384,7 +2393,7 @@ static int edma_probe(struct platform_device *pdev)
ecc);
if (ret) {
dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
- return ret;
+ goto err_disable_pm;
}
ecc->ccerrint = irq;
}
@@ -2392,7 +2401,8 @@ static int edma_probe(struct platform_device *pdev)
ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
if (ecc->dummy_slot < 0) {
dev_err(dev, "Can't allocate PaRAM dummy slot\n");
- return ecc->dummy_slot;
+ ret = ecc->dummy_slot;
+ goto err_disable_pm;
}

queue_priority_mapping = info->queue_priority_mapping;
@@ -2473,6 +2483,8 @@ static int edma_probe(struct platform_device *pdev)

err_reg1:
edma_free_slot(ecc, ecc->dummy_slot);
+err_disable_pm:
+ pm_runtime_disable(dev);
return ret;
}

@@ -2503,6 +2515,7 @@ static int edma_remove(struct platform_device *pdev)
if (ecc->dma_memcpy)
dma_async_device_unregister(ecc->dma_memcpy);
edma_free_slot(ecc, ecc->dummy_slot);
+ pm_runtime_disable(dev);

return 0;
}
--
2.24.0

2019-11-22 05:24:54

by Vinod Koul

Subject: Re: [PATCH 1/2] dmaengine: ti: edma: add missed pm_runtime_disable

On 18-11-19, 15:37, Chuhong Yuan wrote:
> The driver forgets to call pm_runtime_disable in probe failure and
> remove.
> Add the calls and modify probe failure handling to fix it.
>
> Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
> Signed-off-by: Chuhong Yuan <[email protected]>
> ---
> drivers/dma/ti/edma.c | 43 ++++++++++++++++++++++++++++---------------
> 1 file changed, 28 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> index ba7c4f07fcd6..8be32fd9f762 100644
> --- a/drivers/dma/ti/edma.c
> +++ b/drivers/dma/ti/edma.c
> @@ -2282,16 +2282,18 @@ static int edma_probe(struct platform_device *pdev)
> ret = pm_runtime_get_sync(dev);
> if (ret < 0) {
> dev_err(dev, "pm_runtime_get_sync() failed\n");
> - return ret;
> + goto err_disable_pm;

Why would you disable here when sync has returned error?

> }
>
> ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
> if (ret)
> - return ret;
> + goto err_disable_pm;
>
> ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
> - if (!ecc)
> - return -ENOMEM;
> + if (!ecc) {
> + ret = -ENOMEM;
> + goto err_disable_pm;
> + }
>
> ecc->dev = dev;
> ecc->id = pdev->id;
> @@ -2306,30 +2308,37 @@ static int edma_probe(struct platform_device *pdev)
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!mem) {
> dev_err(dev, "no mem resource?\n");
> - return -ENODEV;
> + ret = -ENODEV;
> + goto err_disable_pm;
> }
> }
> ecc->base = devm_ioremap_resource(dev, mem);
> - if (IS_ERR(ecc->base))
> - return PTR_ERR(ecc->base);
> + if (IS_ERR(ecc->base)) {
> + ret = PTR_ERR(ecc->base);
> + goto err_disable_pm;
> + }
>
> platform_set_drvdata(pdev, ecc);
>
> /* Get eDMA3 configuration from IP */
> ret = edma_setup_from_hw(dev, info, ecc);
> if (ret)
> - return ret;
> + goto err_disable_pm;
>
> /* Allocate memory based on the information we got from the IP */
> ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
> sizeof(*ecc->slave_chans), GFP_KERNEL);
> - if (!ecc->slave_chans)
> - return -ENOMEM;
> + if (!ecc->slave_chans) {
> + ret = -ENOMEM;
> + goto err_disable_pm;
> + }
>
> ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
> sizeof(unsigned long), GFP_KERNEL);
> - if (!ecc->slot_inuse)
> - return -ENOMEM;
> + if (!ecc->slot_inuse) {
> + ret = -ENOMEM;
> + goto err_disable_pm;
> + }
>
> ecc->default_queue = info->default_queue;
>
> @@ -2368,7 +2377,7 @@ static int edma_probe(struct platform_device *pdev)
> ecc);
> if (ret) {
> dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
> - return ret;
> + goto err_disable_pm;
> }
> ecc->ccint = irq;
> }
> @@ -2384,7 +2393,7 @@ static int edma_probe(struct platform_device *pdev)
> ecc);
> if (ret) {
> dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
> - return ret;
> + goto err_disable_pm;
> }
> ecc->ccerrint = irq;
> }
> @@ -2392,7 +2401,8 @@ static int edma_probe(struct platform_device *pdev)
> ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
> if (ecc->dummy_slot < 0) {
> dev_err(dev, "Can't allocate PaRAM dummy slot\n");
> - return ecc->dummy_slot;
> + ret = ecc->dummy_slot;
> + goto err_disable_pm;
> }
>
> queue_priority_mapping = info->queue_priority_mapping;
> @@ -2473,6 +2483,8 @@ static int edma_probe(struct platform_device *pdev)
>
> err_reg1:
> edma_free_slot(ecc, ecc->dummy_slot);
> +err_disable_pm:
> + pm_runtime_disable(dev);
> return ret;
> }
>
> @@ -2503,6 +2515,7 @@ static int edma_remove(struct platform_device *pdev)
> if (ecc->dma_memcpy)
> dma_async_device_unregister(ecc->dma_memcpy);
> edma_free_slot(ecc, ecc->dummy_slot);
> + pm_runtime_disable(dev);
>
> return 0;
> }
> --
> 2.24.0

--
~Vinod

2019-11-22 05:41:37

by Chuhong Yuan

Subject: Re: [PATCH 1/2] dmaengine: ti: edma: add missed pm_runtime_disable

On Fri, Nov 22, 2019 at 1:23 PM Vinod Koul <[email protected]> wrote:
>
> On 18-11-19, 15:37, Chuhong Yuan wrote:
> > The driver forgets to call pm_runtime_disable in probe failure and
> > remove.
> > Add the calls and modify probe failure handling to fix it.
> >
> > Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
> > Signed-off-by: Chuhong Yuan <[email protected]>
> > ---
> > drivers/dma/ti/edma.c | 43 ++++++++++++++++++++++++++++---------------
> > 1 file changed, 28 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> > index ba7c4f07fcd6..8be32fd9f762 100644
> > --- a/drivers/dma/ti/edma.c
> > +++ b/drivers/dma/ti/edma.c
> > @@ -2282,16 +2282,18 @@ static int edma_probe(struct platform_device *pdev)
> > ret = pm_runtime_get_sync(dev);
> > if (ret < 0) {
> > dev_err(dev, "pm_runtime_get_sync() failed\n");
> > - return ret;
> > + goto err_disable_pm;
>
> Why would you disable here when sync has returned error?
>

Since pm_runtime_enable is called before sync, we cannot directly return
without disabling it as the original implementation does.

> > }
> >
> > ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
> > if (ret)
> > - return ret;
> > + goto err_disable_pm;
> >
> > ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
> > - if (!ecc)
> > - return -ENOMEM;
> > + if (!ecc) {
> > + ret = -ENOMEM;
> > + goto err_disable_pm;
> > + }
> >
> > ecc->dev = dev;
> > ecc->id = pdev->id;
> > @@ -2306,30 +2308,37 @@ static int edma_probe(struct platform_device *pdev)
> > mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > if (!mem) {
> > dev_err(dev, "no mem resource?\n");
> > - return -ENODEV;
> > + ret = -ENODEV;
> > + goto err_disable_pm;
> > }
> > }
> > ecc->base = devm_ioremap_resource(dev, mem);
> > - if (IS_ERR(ecc->base))
> > - return PTR_ERR(ecc->base);
> > + if (IS_ERR(ecc->base)) {
> > + ret = PTR_ERR(ecc->base);
> > + goto err_disable_pm;
> > + }
> >
> > platform_set_drvdata(pdev, ecc);
> >
> > /* Get eDMA3 configuration from IP */
> > ret = edma_setup_from_hw(dev, info, ecc);
> > if (ret)
> > - return ret;
> > + goto err_disable_pm;
> >
> > /* Allocate memory based on the information we got from the IP */
> > ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
> > sizeof(*ecc->slave_chans), GFP_KERNEL);
> > - if (!ecc->slave_chans)
> > - return -ENOMEM;
> > + if (!ecc->slave_chans) {
> > + ret = -ENOMEM;
> > + goto err_disable_pm;
> > + }
> >
> > ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
> > sizeof(unsigned long), GFP_KERNEL);
> > - if (!ecc->slot_inuse)
> > - return -ENOMEM;
> > + if (!ecc->slot_inuse) {
> > + ret = -ENOMEM;
> > + goto err_disable_pm;
> > + }
> >
> > ecc->default_queue = info->default_queue;
> >
> > @@ -2368,7 +2377,7 @@ static int edma_probe(struct platform_device *pdev)
> > ecc);
> > if (ret) {
> > dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
> > - return ret;
> > + goto err_disable_pm;
> > }
> > ecc->ccint = irq;
> > }
> > @@ -2384,7 +2393,7 @@ static int edma_probe(struct platform_device *pdev)
> > ecc);
> > if (ret) {
> > dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
> > - return ret;
> > + goto err_disable_pm;
> > }
> > ecc->ccerrint = irq;
> > }
> > @@ -2392,7 +2401,8 @@ static int edma_probe(struct platform_device *pdev)
> > ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
> > if (ecc->dummy_slot < 0) {
> > dev_err(dev, "Can't allocate PaRAM dummy slot\n");
> > - return ecc->dummy_slot;
> > + ret = ecc->dummy_slot;
> > + goto err_disable_pm;
> > }
> >
> > queue_priority_mapping = info->queue_priority_mapping;
> > @@ -2473,6 +2483,8 @@ static int edma_probe(struct platform_device *pdev)
> >
> > err_reg1:
> > edma_free_slot(ecc, ecc->dummy_slot);
> > +err_disable_pm:
> > + pm_runtime_disable(dev);
> > return ret;
> > }
> >
> > @@ -2503,6 +2515,7 @@ static int edma_remove(struct platform_device *pdev)
> > if (ecc->dma_memcpy)
> > dma_async_device_unregister(ecc->dma_memcpy);
> > edma_free_slot(ecc, ecc->dummy_slot);
> > + pm_runtime_disable(dev);
> >
> > return 0;
> > }
> > --
> > 2.24.0
>
> --
> ~Vinod

2019-11-22 05:51:00

by Vinod Koul

Subject: Re: [PATCH 1/2] dmaengine: ti: edma: add missed pm_runtime_disable

On 22-11-19, 13:39, Chuhong Yuan wrote:
> On Fri, Nov 22, 2019 at 1:23 PM Vinod Koul <[email protected]> wrote:
> >
> > On 18-11-19, 15:37, Chuhong Yuan wrote:
> > > The driver forgets to call pm_runtime_disable in probe failure and
> > > remove.
> > > Add the calls and modify probe failure handling to fix it.
> > >
> > > Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
> > > Signed-off-by: Chuhong Yuan <[email protected]>
> > > ---
> > > drivers/dma/ti/edma.c | 43 ++++++++++++++++++++++++++++---------------
> > > 1 file changed, 28 insertions(+), 15 deletions(-)
> > >
> > > diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> > > index ba7c4f07fcd6..8be32fd9f762 100644
> > > --- a/drivers/dma/ti/edma.c
> > > +++ b/drivers/dma/ti/edma.c
> > > @@ -2282,16 +2282,18 @@ static int edma_probe(struct platform_device *pdev)
> > > ret = pm_runtime_get_sync(dev);
> > > if (ret < 0) {
> > > dev_err(dev, "pm_runtime_get_sync() failed\n");
> > > - return ret;
> > > + goto err_disable_pm;
> >
> > Why would you disable here when sync has returned error?
> >
>
> Since pm_runtime_enable is called before sync, we cannot directly return
> without disabling it as the original implementation does.

Ok You should have cced Peter and TI folks on this. get_mainatiner.pl is
your friend, use it!

Peter care to test/review this.
>
> > > }
> > >
> > > ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
> > > if (ret)
> > > - return ret;
> > > + goto err_disable_pm;
> > >
> > > ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
> > > - if (!ecc)
> > > - return -ENOMEM;
> > > + if (!ecc) {
> > > + ret = -ENOMEM;
> > > + goto err_disable_pm;
> > > + }
> > >
> > > ecc->dev = dev;
> > > ecc->id = pdev->id;
> > > @@ -2306,30 +2308,37 @@ static int edma_probe(struct platform_device *pdev)
> > > mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > if (!mem) {
> > > dev_err(dev, "no mem resource?\n");
> > > - return -ENODEV;
> > > + ret = -ENODEV;
> > > + goto err_disable_pm;
> > > }
> > > }
> > > ecc->base = devm_ioremap_resource(dev, mem);
> > > - if (IS_ERR(ecc->base))
> > > - return PTR_ERR(ecc->base);
> > > + if (IS_ERR(ecc->base)) {
> > > + ret = PTR_ERR(ecc->base);
> > > + goto err_disable_pm;
> > > + }
> > >
> > > platform_set_drvdata(pdev, ecc);
> > >
> > > /* Get eDMA3 configuration from IP */
> > > ret = edma_setup_from_hw(dev, info, ecc);
> > > if (ret)
> > > - return ret;
> > > + goto err_disable_pm;
> > >
> > > /* Allocate memory based on the information we got from the IP */
> > > ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
> > > sizeof(*ecc->slave_chans), GFP_KERNEL);
> > > - if (!ecc->slave_chans)
> > > - return -ENOMEM;
> > > + if (!ecc->slave_chans) {
> > > + ret = -ENOMEM;
> > > + goto err_disable_pm;
> > > + }
> > >
> > > ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
> > > sizeof(unsigned long), GFP_KERNEL);
> > > - if (!ecc->slot_inuse)
> > > - return -ENOMEM;
> > > + if (!ecc->slot_inuse) {
> > > + ret = -ENOMEM;
> > > + goto err_disable_pm;
> > > + }
> > >
> > > ecc->default_queue = info->default_queue;
> > >
> > > @@ -2368,7 +2377,7 @@ static int edma_probe(struct platform_device *pdev)
> > > ecc);
> > > if (ret) {
> > > dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
> > > - return ret;
> > > + goto err_disable_pm;
> > > }
> > > ecc->ccint = irq;
> > > }
> > > @@ -2384,7 +2393,7 @@ static int edma_probe(struct platform_device *pdev)
> > > ecc);
> > > if (ret) {
> > > dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
> > > - return ret;
> > > + goto err_disable_pm;
> > > }
> > > ecc->ccerrint = irq;
> > > }
> > > @@ -2392,7 +2401,8 @@ static int edma_probe(struct platform_device *pdev)
> > > ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
> > > if (ecc->dummy_slot < 0) {
> > > dev_err(dev, "Can't allocate PaRAM dummy slot\n");
> > > - return ecc->dummy_slot;
> > > + ret = ecc->dummy_slot;
> > > + goto err_disable_pm;
> > > }
> > >
> > > queue_priority_mapping = info->queue_priority_mapping;
> > > @@ -2473,6 +2483,8 @@ static int edma_probe(struct platform_device *pdev)
> > >
> > > err_reg1:
> > > edma_free_slot(ecc, ecc->dummy_slot);
> > > +err_disable_pm:
> > > + pm_runtime_disable(dev);
> > > return ret;
> > > }
> > >
> > > @@ -2503,6 +2515,7 @@ static int edma_remove(struct platform_device *pdev)
> > > if (ecc->dma_memcpy)
> > > dma_async_device_unregister(ecc->dma_memcpy);
> > > edma_free_slot(ecc, ecc->dummy_slot);
> > > + pm_runtime_disable(dev);
> > >
> > > return 0;
> > > }
> > > --
> > > 2.24.0
> >
> > --
> > ~Vinod

--
~Vinod

2019-11-22 07:53:02

by Peter Ujfalusi

Subject: Re: [PATCH 1/2] dmaengine: ti: edma: add missed pm_runtime_disable

Hi,

On 18/11/2019 9.37, Chuhong Yuan wrote:
> The driver forgets to call pm_runtime_disable in probe failure and
> remove.
> Add the calls and modify probe failure handling to fix it.
>
> Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
> Signed-off-by: Chuhong Yuan <[email protected]>
> ---
> drivers/dma/ti/edma.c | 43 ++++++++++++++++++++++++++++---------------
> 1 file changed, 28 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> index ba7c4f07fcd6..8be32fd9f762 100644
> --- a/drivers/dma/ti/edma.c
> +++ b/drivers/dma/ti/edma.c
> @@ -2282,16 +2282,18 @@ static int edma_probe(struct platform_device *pdev)

Please move the pm_runtime_enable/get section just before
edma_setup_from_hw()

> ret = pm_runtime_get_sync(dev);
> if (ret < 0) {
> dev_err(dev, "pm_runtime_get_sync() failed\n");
> - return ret;
> + goto err_disable_pm;

Here you need:
pm_runtime_disable(dev);
return ret;

> }
>
> ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
> if (ret)
> - return ret;
> + goto err_disable_pm;
>
> ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
> - if (!ecc)
> - return -ENOMEM;
> + if (!ecc) {
> + ret = -ENOMEM;
> + goto err_disable_pm;
> + }
>
> ecc->dev = dev;
> ecc->id = pdev->id;
> @@ -2306,30 +2308,37 @@ static int edma_probe(struct platform_device *pdev)
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!mem) {
> dev_err(dev, "no mem resource?\n");
> - return -ENODEV;
> + ret = -ENODEV;
> + goto err_disable_pm;
> }
> }
> ecc->base = devm_ioremap_resource(dev, mem);
> - if (IS_ERR(ecc->base))
> - return PTR_ERR(ecc->base);
> + if (IS_ERR(ecc->base)) {
> + ret = PTR_ERR(ecc->base);
> + goto err_disable_pm;
> + }

None of the above changes needed since the pm_runtime initialization is
moved

> platform_set_drvdata(pdev, ecc);

here.

> /* Get eDMA3 configuration from IP */
> ret = edma_setup_from_hw(dev, info, ecc);
> if (ret)
> - return ret;
> + goto err_disable_pm;
>
> /* Allocate memory based on the information we got from the IP */
> ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
> sizeof(*ecc->slave_chans), GFP_KERNEL);
> - if (!ecc->slave_chans)
> - return -ENOMEM;
> + if (!ecc->slave_chans) {
> + ret = -ENOMEM;
> + goto err_disable_pm;
> + }
>
> ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
> sizeof(unsigned long), GFP_KERNEL);
> - if (!ecc->slot_inuse)
> - return -ENOMEM;
> + if (!ecc->slot_inuse) {
> + ret = -ENOMEM;
> + goto err_disable_pm;
> + }

and this does not apply since we have the
ecc->channels_mask = devm_kcalloc()
in here.

If you rebase, then I would suggest to combine the memory allocation
checks into one:
if (!ecc->slave_chans || !ecc->slot_inuse | !ecc->channels_mask) {
ret = -ENOMEM;
goto err_disable_pm;
}

>
> ecc->default_queue = info->default_queue;
>
> @@ -2368,7 +2377,7 @@ static int edma_probe(struct platform_device *pdev)
> ecc);
> if (ret) {
> dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
> - return ret;
> + goto err_disable_pm;
> }
> ecc->ccint = irq;
> }
> @@ -2384,7 +2393,7 @@ static int edma_probe(struct platform_device *pdev)
> ecc);
> if (ret) {
> dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
> - return ret;
> + goto err_disable_pm;
> }
> ecc->ccerrint = irq;
> }
> @@ -2392,7 +2401,8 @@ static int edma_probe(struct platform_device *pdev)
> ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
> if (ecc->dummy_slot < 0) {
> dev_err(dev, "Can't allocate PaRAM dummy slot\n");
> - return ecc->dummy_slot;
> + ret = ecc->dummy_slot;
> + goto err_disable_pm;
> }
>
> queue_priority_mapping = info->queue_priority_mapping;
> @@ -2473,6 +2483,8 @@ static int edma_probe(struct platform_device *pdev)
>
> err_reg1:
> edma_free_slot(ecc, ecc->dummy_slot);
> +err_disable_pm:

Please add:
pm_runtime_put_sync(dev);

> + pm_runtime_disable(dev);
> return ret;
> }
>
> @@ -2503,6 +2515,7 @@ static int edma_remove(struct platform_device *pdev)
> if (ecc->dma_memcpy)
> dma_async_device_unregister(ecc->dma_memcpy);
> edma_free_slot(ecc, ecc->dummy_slot);

Here also:
pm_runtime_put_sync(dev);


> + pm_runtime_disable(dev);
>
> return 0;
> }
>

- Péter

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