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From: Mark Brown <broonie@kernel.org>
To: Lukas Wunner <lukas@wunner.de>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	Martin Sperl <kernel@martin.sperl.org>,
	linux-spi@vger.kernel.org, linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH 2/5] spi: bcm2835: Fix controller unregister order
Date: Fri, 15 May 2020 17:29:03 +0100
Message-ID: <20200515162903.GH5066@sirena.org.uk> (raw)
In-Reply-To: <2397dd70cdbe95e0bc4da2b9fca0f31cb94e5aed.1589557526.git.lukas@wunner.de>


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On Fri, May 15, 2020 at 05:58:02PM +0200, Lukas Wunner wrote:

> Fix by using the non-devm variant spi_register_controller().  Note that
> the struct spi_controller as well as the driver-private data are not
> freed until after bcm2835_spi_remove() has finished, so accessing them
> is safe.

Why not use managed allocations of clocks and DMA channels?  This is a
standard issue with the devm APIs, if you're using them you basically
need to use them for *everything* up to the point where you start using
them.

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  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-15 15:58 [PATCH 0/5] Raspberry Pi SPI unbind fixes Lukas Wunner
2020-05-15 15:58 ` [PATCH 1/5] spi: Fix controller unregister order Lukas Wunner
2020-05-15 16:27   ` Mark Brown
2020-05-15 16:31     ` Lukas Wunner
2020-05-15 21:37       ` Andy Shevchenko
2020-05-16  6:45         ` Lukas Wunner
2020-05-16  9:45           ` Andy Shevchenko
2020-05-15 15:58 ` [PATCH 2/5] spi: bcm2835: " Lukas Wunner
2020-05-15 16:29   ` Mark Brown [this message]
2020-05-15 16:44     ` Lukas Wunner
2020-05-15 21:33       ` Andy Shevchenko
2020-05-16  6:56         ` Lukas Wunner
2020-05-16  9:40           ` Andy Shevchenko
2020-05-15 15:58 ` [PATCH 3/5] spi: bcm2835aux: " Lukas Wunner
2020-05-15 15:58 ` [PATCH 4/5] spi: bcm2835: Tear down DMA before turning off SPI controller Lukas Wunner
2020-05-15 15:58 ` [PATCH 5/5] spi: Document devm_spi_register_controller() gotcha Lukas Wunner
2020-05-15 16:30   ` Mark Brown
2020-05-20 17:17 ` [PATCH 0/5] Raspberry Pi SPI unbind fixes Mark Brown

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