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

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Date: Fri, 17 May 2024 11:50:58 +0200
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Icenowy Zheng <uwu@...nowy.me>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Amit Kucheria <amitk@...nel.org>, Zhang Rui <rui.zhang@...el.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Kang Chen <void0red@...t.edu.cn>, Dongliang Mu <dzm91@...t.edu.cn>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 0/2] thermal/drivers/mediatek: fix a regression affecting
 other subsystems

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