netdev - Re: [PATCH v2 02/15] spi: Drop duplicate IDR allocation code in spi_register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Mon, 10 Jul 2023 18:09:00 +0100
From: Mark Brown <broonie@...nel.org>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
	Yang Yingliang <yangyingliang@...wei.com>,
	Amit Kumar Mahapatra via Alsa-devel <alsa-devel@...a-project.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Tharun Kumar P <tharunkumar.pasumarthi@...rochip.com>,
	Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-amlogic@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, linux-riscv@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-trace-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Sanjay R Mehta <sanju.mehta@....com>,
	Radu Pirea <radu_nicolae.pirea@....ro>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Claudiu Beznea <claudiu.beznea@...rochip.com>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Serge Semin <fancer.lancer@...il.com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	NXP Linux Team <linux-imx@....com>,
	Kevin Hilman <khilman@...libre.com>,
	Jerome Brunet <jbrunet@...libre.com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Andy Gross <agross@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Orson Zhai <orsonzhai@...il.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Chunyan Zhang <zhang.lyra@...il.com>,
	Alain Volmat <alain.volmat@...s.st.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Max Filippov <jcmvbkbc@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH v2 02/15] spi: Drop duplicate IDR allocation code in
 spi_register_controller()

On Mon, Jul 10, 2023 at 06:49:19PM +0300, Andy Shevchenko wrote:

> Refactor spi_register_controller() to drop duplicate IDR allocation.
> Instead of if-else-if branching use two sequential if:s, which allows
> to re-use the logic of IDR allocation in all cases.

For legibility this should have been split into a separate factoring out
of the shared code and rewriting of the logic, that'd make it trivial to
review.

> -		mutex_lock(&board_lock);
> -		id = idr_alloc(&spi_master_idr, ctlr, first_dynamic,
> -			       0, GFP_KERNEL);
> -		mutex_unlock(&board_lock);
> -		if (WARN(id < 0, "couldn't get idr"))
> -			return id;
> -		ctlr->bus_num = id;
> +		status = spi_controller_id_alloc(ctlr, first_dynamic, 0);
> +		if (status)
> +			return status;

The original does not do the remapping of return codes that the previous
two copies do...

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)