From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org,
Tudor Ambarus <tudor.ambarus@linaro.org>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Claudiu Beznea <claudiu.beznea@microchip.com>,
Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Samuel Holland <samuel@sholland.org>,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev
Subject: Re: [PATCH v2 2/3] spi: atmel: Prevent false timeouts on long transfers
Date: Thu, 22 Jun 2023 10:25:18 +0200 [thread overview]
Message-ID: <20230622102518.0dd4c268@xps-13> (raw)
In-Reply-To: <9988258d-5797-402a-9d92-c7c9e1afa73c@sirena.org.uk>
Hi Mark,
broonie@kernel.org wrote on Wed, 21 Jun 2023 15:59:34 +0100:
> On Mon, Jun 19, 2023 at 05:53:48PM +0200, Miquel Raynal wrote:
> > A slow SPI bus clocks at ~20MHz, which means it would transfer about
> > 2500 bytes per second with a single data line. Big transfers, like when
> > dealing with flashes can easily reach a few MiB. The current DMA timeout
> > is set to 1 second, which means any working transfer of about 4MiB will
> > always be cancelled.
>
> This breaks the build:
>
> /build/stage/linux/drivers/spi/spi-atmel.c: In function ‘atmel_spi_one_transfer’
> :
> /build/stage/linux/drivers/spi/spi-atmel.c:1338:76: error: ‘master’ undeclared (
> first use in this function)
> 1338 | dma_timeout = msecs_to_jiffies(spi_controller_xfer_timeo
> ut(master, xfer));
> |
> ^~~~~~
> /build/stage/linux/drivers/spi/spi-atmel.c:1338:76: note: each undeclared identi
> fier is reported only once for each function it appears in
I am testing on a customer board which currently runs on 6.1, I lacked
398b6b310ec8 ("spi: atmel: switch to use modern name"). I'll send an update.
Thanks,
Miquèl
next prev parent reply other threads:[~2023-06-22 8:25 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-19 15:53 [PATCH v2 0/3] spi: Helper for deriving timeout values Miquel Raynal
2023-06-19 15:53 ` [PATCH v2 1/3] spi: Create a helper to derive adaptive timeouts Miquel Raynal
2023-06-19 15:53 ` [PATCH v2 2/3] spi: atmel: Prevent false timeouts on long transfers Miquel Raynal
2023-06-21 14:59 ` Mark Brown
2023-06-22 8:25 ` Miquel Raynal [this message]
2023-06-19 15:53 ` [PATCH v2 3/3] spi: sun6i: Use the new helper to derive the xfer timeout value Miquel Raynal
2023-06-21 15:51 ` Jernej Škrabec
2023-06-26 16:47 ` [PATCH v2 0/3] spi: Helper for deriving timeout values Mark Brown
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