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

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Message-ID: <CAK8P3a09stVcEr9xBOLbkw7ZtzdZpP_pqE4wYRzBoC70c3h1eA@mail.gmail.com>
Date:   Tue, 26 Jan 2021 10:10:16 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     "Jorge Ramirez-Ortiz, Foundries" <jorge@...ndries.io>
Cc:     Jens Wiklander <jens.wiklander@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        op-tee@...ts.trustedfirmware.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] optee: simplify i2c access

On Tue, Jan 26, 2021 at 9:08 AM Jorge Ramirez-Ortiz, Foundries
<jorge@...ndries.io> wrote:
>
> On 25/01/21, Arnd Bergmann 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")
>
> does fixing stack-frame compile warnings need a 'fixes' tag?

The fixes tag only describes which commit introduced the bug, it is irrelevant
what type of bug this is.

      Arnd