Re: [PATCH v2 08/27] i2c: busses: remove memset after dmam_alloc_coherent

[Wolfram Sang]

On Fri, Jun 28, 2019 at 09:22:31AM +0300, Jarkko Nikula wrote:
> Hi
> 
> On 6/28/19 5:47 AM, Fuqian Huang wrote:
> > In commit af7ddd8a627c
> > ("Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping"),
> > dmam_alloc_coherent has already zeroed the memory.
> > So memset is not needed.
> > 
> > Signed-off-by: Fuqian Huang <huangfq.daxian@xxxxxxxxx>
> > ---
> >   drivers/i2c/busses/i2c-ismt.c | 2 --
> >   1 file changed, 2 deletions(-)
> > 
> It would be better to refer actual commit or commits that implement that
> zeroing rather than merge point in commit log if possible.
> 
> At quick look commit 518a2f1925c3 ("dma-mapping: zero memory returned from
> dma_alloc_*") is the one but I'm not really an expert here to say is that
> alone enough.

Fuqian, can you clarify if the commit pointed by Jarkko is enough as a
reference or if it really needs the merge tag?

Also, please include the tags you collected in v1 when sending v2 (and
there was no significant code change).

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