Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR

Wolfram Sang
2023-10-26T11:19:02Z

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On Fri, Sep 29, 2023 at 11:48:10AM +0300, Jarkko Nikula wrote:
> On 9/27/23 22:38, Wolfram Sang wrote:
> >
> > > So my next question, is the change to dw_reg_write something that I should
> > > write and submit, or should someone else submit something more generalized,
> > > like option 2 above? I don't own the i2c driver, I'm just trying to fix one
> > > issue on one processor with minimal risk of breaking something. I don't have
> > > the broader view of what's optimal for the whole DesignWare i2c driver. I
> > > also don't have any way to test changes on other models of processors.
> >
> > Well, I guess this is a question for the designware maintainers: do we
> > want this one conversion from *_relaxed to non-relaxed. Or are we
> > playing safe by using non-relaxed all the time. I would suggest the
> > latter because the drivers I look after hardly write registers in a hot
> > path (and not many of them at a time). But you guys know your driver
> > better...
> >
> Well I don't have any preference (read enough knowledge) either here and I
> hardly think performance becomes issue in any configuration.

So, someone wants to come up with a patch to move to non-relaxed io
accessors?

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