linux-kernel - Re: [PATCH] optee: simplify i2c access

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Date:   Mon, 8 Feb 2021 08:00:55 +0100
From:   Jens Wiklander <jens.wiklander@...aro.org>
To:     Jorge Ramirez-Ortiz <jorge@...ndries.io>
Cc:     Arnd Bergmann <arnd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        op-tee@...ts.trustedfirmware.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] optee: simplify i2c access

Hi Jorge,

On Wed, Jan 27, 2021 at 11:41 AM Jens Wiklander
<jens.wiklander@...aro.org> wrote:
>
> Hi Arnd,
>
> On Mon, Jan 25, 2021 at 12:38 PM Arnd Bergmann <arnd@...nel.org> wrote:
> >
> > From: Arnd Bergmann <arnd@...db.de>
> >
> > Storing a bogus i2c_client structure on the stack adds overhead and
> > causes a compile-time warning:
> >
> > drivers/tee/optee/rpc.c:493:6: error: stack frame size of 1056 bytes in function 'optee_handle_rpc' [-Werror,-Wframe-larger-than=]
> > void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param,
> >
> > Change the implementation of handle_rpc_func_cmd_i2c_transfer() to
> > open-code the i2c_transfer() call, which makes it easier to read
> > and avoids the warning.
> >
> > Fixes: c05210ab9757 ("drivers: optee: allow op-tee to access devices on the i2c bus")
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> > ---
> >  drivers/tee/optee/rpc.c | 31 ++++++++++++++++---------------
> >  1 file changed, 16 insertions(+), 15 deletions(-)
>
> Looks good to me.
> Reviewed-by: Jens Wiklander <jens.wiklander@...aro.org>

Would you mind testing this?

Thanks,
Jens