linux-kernel - Re: [PATCH v2 1/1] tpm/tpm_i2c_infineon: Fix init endian vendor check

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Date:   Mon, 13 Sep 2021 11:03:02 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Florian Eckert <fe@....tdt.de>
Cc:     peterhuewe@....de, jarkko@...nel.org,
        Eckert.Florian@...glemail.com, linux-integrity@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] tpm/tpm_i2c_infineon: Fix init endian vendor check

On Mon, Sep 13, 2021 at 03:46:48PM +0200, Florian Eckert wrote:
> Hello Jason,
> 
> > > The device works than as expected.
> > > 
> > > Signed-off-by: Florian Eckert <fe@....tdt.de>
> > > v2:
> > > * use variable type instead of le32_to_cpus function call
> > >  drivers/char/tpm/tpm_i2c_infineon.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > And if you do this it need to be made sparse clean/etc
> 
> Sorry for the stupid question, but what exactly do you mean?

There is a tool called sparse that checks the endia notations and
verfies correctness

It will complain if you do

__le32 x

x = le32tocpu(x)

you neeed another variable to store the cpu version

Jason