netdev - Re: [PATCH v1] treewide, serdev: change receive_buf() return type to size

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Date: Fri, 15 Dec 2023 14:26:48 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Francesco Dolcini <francesco@...cini.it>
Cc: Jiri Slaby <jirislaby@...nel.org>, linux-bluetooth@...r.kernel.org,
	linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, greybus-dev@...ts.linaro.org,
	linux-iio@...r.kernel.org, netdev@...r.kernel.org,
	chrome-platform@...ts.linux.dev,
	platform-driver-x86@...r.kernel.org, linux-serial@...r.kernel.org,
	linux-sound@...r.kernel.org,
	Francesco Dolcini <francesco.dolcini@...adex.com>,
	Luiz Augusto von Dentz <luiz.dentz@...il.com>,
	Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
	Jonathan Cameron <jic23@...nel.org>, Lee Jones <lee@...nel.org>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Benson Leung <bleung@...omium.org>,
	Tzung-Bi Shih <tzungbi@...nel.org>, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v1] treewide, serdev: change receive_buf() return type to
 size_t

On Thu, Dec 14, 2023 at 06:39:44PM +0100, Francesco Dolcini wrote:
> On Thu, Dec 14, 2023 at 06:01:46PM +0100, Francesco Dolcini wrote:
> > From: Francesco Dolcini <francesco.dolcini@...adex.com>
> > 
> > receive_buf() is called from ttyport_receive_buf() that expects values
> > ">= 0" from serdev_controller_receive_buf(), change its return type from
> > ssize_t to size_t.
> > 
> > Suggested-by: Jiri Slaby <jirislaby@...nel.org>
> > Link: https://lore.kernel.org/all/087be419-ec6b-47ad-851a-5e1e3ea5cfcc@kernel.org/
> > Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
> > ---
> > hello,
> > patch is based on current linux next.
> > 
> > It has an obvious problem, it touches files from multiple subsystem in a single
> > patch that is complicated to review and eventually merge, just splitting this
> > would however not work, it will break bisectability and the build.
> > 
> > I am looking for advise on the best way to move forward.
> > 
> > I see the following options:
> >  - keep it as it is
> >  - break it down with a patch with each subsystem, and squash before applying
> >    from a single (tty?) subsystem
> >  - go for a multi stage approach, defining a new callback, move to it and in
> >    the end remove the original one, likewise it was done for i2c lately
> 
> whoops. I just noticed Greg applied commit 475fc6e2de6f ("tty: serdev:
> convert to u8 and size_t") that touch the exact same files without much
> of an issue.
> 
> Probably the "keep it as it is" is just the way to go.

Yeah, looks good to me, now queued up, thanks!

greg k-h