From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Anton Bondarenko
<anton.bondarenko.sama-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 04/12] spi: imx: drop fallback to PIO
Date: Sat, 20 Feb 2016 00:51:03 +0900 [thread overview]
Message-ID: <20160219155103.GS18327@sirena.org.uk> (raw)
In-Reply-To: <1455867792-26389-5-git-send-email-s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
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On Fri, Feb 19, 2016 at 08:43:04AM +0100, Sascha Hauer wrote:
> At the moment the driver decides to fallback to PIO mode the buffers
> are already mapped for DMA. It's a bug to access them with the CPU
> afterwards, so we cannot just fallback to PIO mode.
This doesn't apply against current code, please check and resend.
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next prev parent reply other threads:[~2016-02-19 15:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-19 7:43 [PATCH v2] i.MX SPI DMA cleanup Sascha Hauer
[not found] ` <1455867792-26389-1-git-send-email-s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2016-02-19 7:43 ` [PATCH 01/12] spi: imx: allow only WML aligned transfers to use DMA Sascha Hauer
2016-02-19 7:43 ` [PATCH 02/12] spi: imx: use proper dev_* functions for driver messages Sascha Hauer
2016-02-19 7:43 ` [PATCH 03/12] spi: imx: replace fixed timeout with calculated Sascha Hauer
2016-02-19 7:43 ` [PATCH 04/12] spi: imx: drop fallback to PIO Sascha Hauer
[not found] ` <1455867792-26389-5-git-send-email-s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2016-02-19 15:51 ` Mark Brown [this message]
2016-02-19 7:43 ` [PATCH 05/12] spi: imx: initialize usedma earlier Sascha Hauer
[not found] ` <1455867792-26389-6-git-send-email-s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2016-02-19 8:08 ` Lothar Waßmann
2016-02-19 7:43 ` [PATCH 06/12] spi: imx: drop unnecessary read/modify/write Sascha Hauer
2016-02-19 7:43 ` [PATCH 07/12] spi: imx: drop unncessary dma_is_inited variable Sascha Hauer
2016-02-19 7:43 ` [PATCH 08/12] spi: imx: add support for all SPI word width for DMA Sascha Hauer
2016-02-19 7:43 ` [PATCH 09/12] spi: imx: remove unnecessary bit clearing in mx51_ecspi_config Sascha Hauer
2016-02-19 7:43 ` [PATCH 10/12] spi: imx: make some register defines simpler Sascha Hauer
2016-02-19 7:43 ` [PATCH 11/12] spi: imx: set MX51_ECSPI_CTRL_SMC bit in setup function Sascha Hauer
2016-02-19 7:43 ` [PATCH 12/12] spi: imx: drop bogus tests for rx/tx bufs in DMA transfer Sascha Hauer
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