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

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Message-ID: <20210126114507.GA9282@trex>
Date:   Tue, 26 Jan 2021 12:45:07 +0100
From:   "Jorge Ramirez-Ortiz, Foundries" <jorge@...ndries.io>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     "Jorge Ramirez-Ortiz, Foundries" <jorge@...ndries.io>,
        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 26/01/21, Arnd Bergmann wrote:
> 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

thanks Arnd.

what compiler warnings are defined as kernel bugs? is there a list
that you use when tracking these?