pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.
Signed-off-by: Dinghao Liu <[email protected]>
---
drivers/dma/tegra210-adma.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index c4ce5dfb149b..803e1f4d5dac 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
ret = pm_runtime_get_sync(tdc2dev(tdc));
if (ret < 0) {
+ pm_runtime_put_sync(tdc2dev(tdc));
free_irq(tdc->irq, tdc);
return ret;
}
--
2.17.1
On 22/05/2020 08:58, Dinghao Liu wrote:
> pm_runtime_get_sync() increments the runtime PM usage counter even
> when it returns an error code. Thus a pairing decrement is needed on
> the error handling path to keep the counter balanced.
>
> Signed-off-by: Dinghao Liu <[email protected]>
> ---
> drivers/dma/tegra210-adma.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> index c4ce5dfb149b..803e1f4d5dac 100644
> --- a/drivers/dma/tegra210-adma.c
> +++ b/drivers/dma/tegra210-adma.c
> @@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
>
> ret = pm_runtime_get_sync(tdc2dev(tdc));
> if (ret < 0) {
> + pm_runtime_put_sync(tdc2dev(tdc));
> free_irq(tdc->irq, tdc);
> return ret;
> }
>
There is another place in probe that needs to be fixed as well. Can you
correct this while you are at it?
Thanks
Jon
--
nvpublic
>
> On 22/05/2020 08:58, Dinghao Liu wrote:
> > pm_runtime_get_sync() increments the runtime PM usage counter even
> > when it returns an error code. Thus a pairing decrement is needed on
> > the error handling path to keep the counter balanced.
> >
> > Signed-off-by: Dinghao Liu <[email protected]>
> > ---
> > drivers/dma/tegra210-adma.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> > index c4ce5dfb149b..803e1f4d5dac 100644
> > --- a/drivers/dma/tegra210-adma.c
> > +++ b/drivers/dma/tegra210-adma.c
> > @@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
> >
> > ret = pm_runtime_get_sync(tdc2dev(tdc));
> > if (ret < 0) {
> > + pm_runtime_put_sync(tdc2dev(tdc));
> > free_irq(tdc->irq, tdc);
> > return ret;
> > }
> >
>
>
> There is another place in probe that needs to be fixed as well. Can you
> correct this while you are at it?
>
> Thanks
> Jon
>
> --
> nvpublic
Sure. I have sent a patch to fix PM imbalance in tegra_adma_probe().
Regards,
Dinghao
On 22/05/2020 11:57, [email protected] wrote:
>>
>> On 22/05/2020 08:58, Dinghao Liu wrote:
>>> pm_runtime_get_sync() increments the runtime PM usage counter even
>>> when it returns an error code. Thus a pairing decrement is needed on
>>> the error handling path to keep the counter balanced.
>>>
>>> Signed-off-by: Dinghao Liu <[email protected]>
>>> ---
>>> drivers/dma/tegra210-adma.c | 1 +
>>> 1 file changed, 1 insertion(+)
>>>
>>> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
>>> index c4ce5dfb149b..803e1f4d5dac 100644
>>> --- a/drivers/dma/tegra210-adma.c
>>> +++ b/drivers/dma/tegra210-adma.c
>>> @@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
>>>
>>> ret = pm_runtime_get_sync(tdc2dev(tdc));
>>> if (ret < 0) {
>>> + pm_runtime_put_sync(tdc2dev(tdc));
>>> free_irq(tdc->irq, tdc);
>>> return ret;
>>> }
>>>
>>
>>
>> There is another place in probe that needs to be fixed as well. Can you
>> correct this while you are at it?
>>
>> Thanks
>> Jon
>>
>> --
>> nvpublic
>
> Sure. I have sent a patch to fix PM imbalance in tegra_adma_probe().
You should only send one patch to fix both instances as it is the same
driver. It is impossible to figure out that two patches with the same
$subject are different.
Jon
--
nvpublic
>
> On 22/05/2020 11:57, [email protected] wrote:
> >>
> >> On 22/05/2020 08:58, Dinghao Liu wrote:
> >>> pm_runtime_get_sync() increments the runtime PM usage counter even
> >>> when it returns an error code. Thus a pairing decrement is needed on
> >>> the error handling path to keep the counter balanced.
> >>>
> >>> Signed-off-by: Dinghao Liu <[email protected]>
> >>> ---
> >>> drivers/dma/tegra210-adma.c | 1 +
> >>> 1 file changed, 1 insertion(+)
> >>>
> >>> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> >>> index c4ce5dfb149b..803e1f4d5dac 100644
> >>> --- a/drivers/dma/tegra210-adma.c
> >>> +++ b/drivers/dma/tegra210-adma.c
> >>> @@ -658,6 +658,7 @@ static int tegra_adma_alloc_chan_resources(struct dma_chan *dc)
> >>>
> >>> ret = pm_runtime_get_sync(tdc2dev(tdc));
> >>> if (ret < 0) {
> >>> + pm_runtime_put_sync(tdc2dev(tdc));
> >>> free_irq(tdc->irq, tdc);
> >>> return ret;
> >>> }
> >>>
> >>
> >>
> >> There is another place in probe that needs to be fixed as well. Can you
> >> correct this while you are at it?
> >>
> >> Thanks
> >> Jon
> >>
> >> --
> >> nvpublic
> >
> > Sure. I have sent a patch to fix PM imbalance in tegra_adma_probe().
>
>
> You should only send one patch to fix both instances as it is the same
> driver. It is impossible to figure out that two patches with the same
> $subject are different.
>
> Jon
>
> --
> nvpublic
OK. I will fix this in the next version of patch.
Regards,
Dinghao