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 5/5] spi: Document devm_spi_register_controller() gotcha
Date: Fri, 15 May 2020 17:30:00 +0100 [thread overview]
Message-ID: <20200515163000.GI5066@sirena.org.uk> (raw)
In-Reply-To: <d0dcbd098401b5d2a486eee7cf2f9dcabacf9605.1589557526.git.lukas@wunner.de>
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On Fri, May 15, 2020 at 05:58:05PM +0200, Lukas Wunner wrote:
> As a rule, devm_spi_register_controller() must not be used if the
> driver's ->remove() hook performs teardown steps which shall be
> performed after unbinding of slaves.
>
> Dozens of drivers are doing it wrong. Document this gotcha to
> hopefully prevent further misuse.
This is something that needs to be documented at the devm level, it
applies to pretty much every managed API.
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next prev parent reply other threads:[~2020-05-15 16:30 UTC|newest]
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
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 [this message]
2020-05-20 17:17 ` [PATCH 0/5] Raspberry Pi SPI unbind fixes Mark Brown
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