linux-kernel - Re: [PATCH 09/18] spi: stm32h7: fix race condition at end of transfer

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Message-ID: <20200805105357.GD5556@sirena.org.uk>
Date:   Wed, 5 Aug 2020 11:53:57 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Alain Volmat <alain.volmat@...com>
Cc:     amelie.delaunay@...com, mcoquelin.stm32@...il.com,
        alexandre.torgue@...com, linux-spi@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        fabrice.gasnier@...com
Subject: Re: [PATCH 09/18] spi: stm32h7: fix race condition at end of transfer

On Wed, Aug 05, 2020 at 09:02:04AM +0200, Alain Volmat wrote:
> From: Antonio Borneo <antonio.borneo@...com>
> 
> The caller of stm32_spi_transfer_one(), spi_transfer_one_message(),
> is waiting for us to call spi_finalize_current_transfer() and will
> eventually schedule a new transfer, if available.
> We should guarantee that the spi controller is really available
> before calling spi_finalize_current_transfer().
> 
> Move the call to spi_finalize_current_transfer() _after_ the call
> to stm32_spi_disable().

This seems like a bug fix and should therefore be at the start of the
series so it can be sent to mainline without the new development work.

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