netdev - Re: [PATCH v2 04/15] spi: Replace open coded spi_controller_xfer

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]

Message-ID: <cfaffa00-4b61-4d81-8675-70295844513b@sirena.org.uk>
Date: Mon, 10 Jul 2023 18:30:32 +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 04/15] spi: Replace open coded
 spi_controller_xfer_timeout()

On Mon, Jul 10, 2023 at 06:49:21PM +0300, Andy Shevchenko wrote:

> Since the new spi_controller_xfer_timeout() helper appeared,
> we may replace open coded variant in spi_transfer_wait().

> + * Assume speed to be 100 kHz if it's not defined at the time of invocation.
> + *

You didn't mention this bit in the changelog, and I'm not 100% convinced
it was the best idea in the first place.  It's going to result in some
very big timeouts if it goes off, and we really should be doing
validation much earlier in the process.

> +	u32 speed_hz = xfer->speed_hz ?: 100000;

Not only the ternery operator, but the version without the second
argument for extra clarity!

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