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From: Mark Brown <broonie@kernel.org>
To: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: krzysztof.kozlowski@linaro.org, andi@etezian.org,
	kernel@axis.com, alim.akhtar@samsung.com,
	linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 4/4] spi: s3c64xx: Fix large transfers with DMA
Date: Mon, 26 Sep 2022 14:52:49 +0100	[thread overview]
Message-ID: <YzGusRaUtlFLT/d/@sirena.org.uk> (raw)
In-Reply-To: <YzGsRkyf9tyvjvBy@axis.com>


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On Mon, Sep 26, 2022 at 03:42:30PM +0200, Vincent Whitchurch wrote:
> On Mon, Sep 19, 2022 at 03:38:29PM +0100, Mark Brown wrote:

> > The driver should just set max_transfer_size and let the core
> > handle this.

> Hmm, AFAICS, the core doesn't actually do anything with
> max_transfer_size?  It's only used from spi-mem and a handful of other
> clients via spi_max_transfer_size().

Then we should fix the core to handle it properly.

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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: krzysztof.kozlowski@linaro.org, andi@etezian.org,
	kernel@axis.com, alim.akhtar@samsung.com,
	linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 4/4] spi: s3c64xx: Fix large transfers with DMA
Date: Mon, 26 Sep 2022 14:52:49 +0100	[thread overview]
Message-ID: <YzGusRaUtlFLT/d/@sirena.org.uk> (raw)
In-Reply-To: <YzGsRkyf9tyvjvBy@axis.com>

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On Mon, Sep 26, 2022 at 03:42:30PM +0200, Vincent Whitchurch wrote:
> On Mon, Sep 19, 2022 at 03:38:29PM +0100, Mark Brown wrote:

> > The driver should just set max_transfer_size and let the core
> > handle this.

> Hmm, AFAICS, the core doesn't actually do anything with
> max_transfer_size?  It's only used from spi-mem and a handful of other
> clients via spi_max_transfer_size().

Then we should fix the core to handle it properly.

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  reply	other threads:[~2022-09-26 13:54 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-16 11:39 [PATCH 0/4] spi: Fix DMA bugs in (not only) spi-s3c64xx Vincent Whitchurch
2022-09-16 11:39 ` Vincent Whitchurch
2022-09-16 11:39 ` [PATCH 1/4] spi: spi-loopback-test: Add test to trigger DMA/PIO mixing Vincent Whitchurch
2022-09-16 11:39   ` Vincent Whitchurch
2022-09-19 14:41   ` Mark Brown
2022-09-19 14:41     ` Mark Brown
2022-09-16 11:39 ` [PATCH 2/4] spi: Save current RX and TX DMA devices Vincent Whitchurch
2022-09-16 11:39   ` Vincent Whitchurch
2022-09-16 11:39 ` [PATCH 3/4] spi: Fix cache corruption due to DMA/PIO overlap Vincent Whitchurch
2022-09-16 11:39   ` Vincent Whitchurch
2022-09-16 16:06   ` kernel test robot
2022-09-16 16:06     ` kernel test robot
2022-09-16 11:39 ` [PATCH 4/4] spi: s3c64xx: Fix large transfers with DMA Vincent Whitchurch
2022-09-16 11:39   ` Vincent Whitchurch
2022-09-19  9:43   ` Krzysztof Kozlowski
2022-09-19  9:43     ` Krzysztof Kozlowski
2022-09-19 14:38   ` Mark Brown
2022-09-19 14:38     ` Mark Brown
2022-09-26 13:42     ` Vincent Whitchurch
2022-09-26 13:42       ` Vincent Whitchurch
2022-09-26 13:52       ` Mark Brown [this message]
2022-09-26 13:52         ` Mark Brown
2022-09-19 16:50 ` (subset) [PATCH 0/4] spi: Fix DMA bugs in (not only) spi-s3c64xx Mark Brown
2022-09-19 16:50   ` Mark Brown

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