linux-kernel - Re: [PATCH RFC 3/5] mmc: mmci: relax blksz check for SDIO

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Date:	Tue, 12 Aug 2014 15:12:43 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	linux-mmc@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH RFC 3/5] mmc: mmci: relax blksz check for SDIO

On Tue, Aug 12, 2014 at 01:04:40PM +0100, Srinivas Kandagatla wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> 
> This patch adds condition in mmci_validate_data to skip checking
> blocksize for SDIO card types. SDIO card type can issue blocksizes
> which are not exactly power of 2 so this check always fails, resulting
> in SDIO failures.

Do you understand why this check is there?

Do you realise that the standard MMCI from ARM Ltd can /only/ perform
power-of-2 block transfers?

Hence, NAK on this change as it stands.

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