Re: [PATCH 0/2] thermal/drivers/mediatek: fix a regression affecting other subsystems

Re: [PATCH 0/2] thermal/drivers/mediatek: fix a regression affecting other subsystems

[Daniel Lezcano]

On 29/05/2023 18:20, Icenowy Zheng wrote:
> In the commit I reverted as the first commit of this patchset, the
> of_iomap function call, which allows multiple mapping of the same
> physical memory space, is replaced to calling devm_of_iomap, which
> registers exclusivity, and on my system (mt8173-elm), preventing display
> from working.
> 
> So I reverted it, and to really solve the problem that the original
> commit wants to solve, I read the source of auxadc-thermal and realized
> that the address of these two memory blocks are not saved after probe,
> and they're only used when initializing the thermal sensors. This leads
> to my final fix, which is the second commit here, that adds of_iounmap
> just to the probe function.
> 
> Icenowy Zheng (2):
>    Revert "thermal/drivers/mediatek: Use devm_of_iomap to avoid resource
>      leak in mtk_thermal_probe"
>    thermal/drivers/mediatek: unmap foreign MMIO after probing
> 
>   drivers/thermal/mediatek/auxadc_thermal.c | 46 ++++++++++++-----------
>   1 file changed, 24 insertions(+), 22 deletions(-)

I'll apply only the revert and let you revisit the patch 2 which could 
be improved.

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Re: [PATCH 0/2] thermal/drivers/mediatek: fix a regression affecting other subsystems

[Icenowy Zheng]

在 2023-06-13星期二的 10:44 +0200，Daniel Lezcano写道：
> On 29/05/2023 18:20, Icenowy Zheng wrote:
> > In the commit I reverted as the first commit of this patchset, the
> > of_iomap function call, which allows multiple mapping of the same
> > physical memory space, is replaced to calling devm_of_iomap, which
> > registers exclusivity, and on my system (mt8173-elm), preventing
> > display
> > from working.
> > 
> > So I reverted it, and to really solve the problem that the original
> > commit wants to solve, I read the source of auxadc-thermal and
> > realized
> > that the address of these two memory blocks are not saved after
> > probe,
> > and they're only used when initializing the thermal sensors. This
> > leads
> > to my final fix, which is the second commit here, that adds
> > of_iounmap
> > just to the probe function.
> > 
> > Icenowy Zheng (2):
> >    Revert "thermal/drivers/mediatek: Use devm_of_iomap to avoid
> > resource
> >      leak in mtk_thermal_probe"
> >    thermal/drivers/mediatek: unmap foreign MMIO after probing
> > 
> >   drivers/thermal/mediatek/auxadc_thermal.c | 46 ++++++++++++------
> > -----
> >   1 file changed, 24 insertions(+), 22 deletions(-)
> 
> I'll apply only the revert and let you revisit the patch 2 which
> could 
> be improved.

Sorry, is the first patch applied? I didn't see it in any kernel
trees...

I have no current idea about how to fix in patch 2.

> 

Re: [PATCH 0/2] thermal/drivers/mediatek: fix a regression affecting other subsystems

[Daniel Lezcano]

On 22/07/2023 14:13, Icenowy Zheng wrote:
> 在 2023-06-13星期二的 10:44 +0200，Daniel Lezcano写道：
>> On 29/05/2023 18:20, Icenowy Zheng wrote:
>>> In the commit I reverted as the first commit of this patchset, the
>>> of_iomap function call, which allows multiple mapping of the same
>>> physical memory space, is replaced to calling devm_of_iomap, which
>>> registers exclusivity, and on my system (mt8173-elm), preventing
>>> display
>>> from working.
>>>
>>> So I reverted it, and to really solve the problem that the original
>>> commit wants to solve, I read the source of auxadc-thermal and
>>> realized
>>> that the address of these two memory blocks are not saved after
>>> probe,
>>> and they're only used when initializing the thermal sensors. This
>>> leads
>>> to my final fix, which is the second commit here, that adds
>>> of_iounmap
>>> just to the probe function.
>>>
>>> Icenowy Zheng (2):
>>>     Revert "thermal/drivers/mediatek: Use devm_of_iomap to avoid
>>> resource
>>>       leak in mtk_thermal_probe"
>>>     thermal/drivers/mediatek: unmap foreign MMIO after probing
>>>
>>>    drivers/thermal/mediatek/auxadc_thermal.c | 46 ++++++++++++------
>>> -----
>>>    1 file changed, 24 insertions(+), 22 deletions(-)
>>
>> I'll apply only the revert and let you revisit the patch 2 which
>> could
>> be improved.
> 
> Sorry, is the first patch applied? I didn't see it in any kernel
> trees...

Yes, sorry, I got another patch meanwhile which provided the same revert 
with more tags

https://lore.kernel.org/r/20230525121811.3360268-1-ricardo.canuelo@collabora.com


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Re: [PATCH 0/2] thermal/drivers/mediatek: fix a regression affecting other subsystems

[Dan Carpenter]

On Tue, Jun 13, 2023 at 10:44:51AM +0200, Daniel Lezcano wrote:
> On 29/05/2023 18:20, Icenowy Zheng wrote:
> > In the commit I reverted as the first commit of this patchset, the
> > of_iomap function call, which allows multiple mapping of the same
> > physical memory space, is replaced to calling devm_of_iomap, which
> > registers exclusivity, and on my system (mt8173-elm), preventing display
> > from working.
> > 
> > So I reverted it, and to really solve the problem that the original
> > commit wants to solve, I read the source of auxadc-thermal and realized
> > that the address of these two memory blocks are not saved after probe,
> > and they're only used when initializing the thermal sensors. This leads
> > to my final fix, which is the second commit here, that adds of_iounmap
> > just to the probe function.
> > 
> > Icenowy Zheng (2):
> >    Revert "thermal/drivers/mediatek: Use devm_of_iomap to avoid resource
> >      leak in mtk_thermal_probe"
> >    thermal/drivers/mediatek: unmap foreign MMIO after probing
> > 
> >   drivers/thermal/mediatek/auxadc_thermal.c | 46 ++++++++++++-----------
> >   1 file changed, 24 insertions(+), 22 deletions(-)
> 
> I'll apply only the revert and let you revisit the patch 2 which could be
> improved.

What's the issue with patch 2/2?  It looks okay to me.

regards,
dan carpenter