From: Aaron Lu <aaron.lu@amd.com>
To: Matthieu CASTET <matthieu.castet@parrot.com>
Cc: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Subject: Re: sdhci max_blk_size
Date: Thu, 5 Jan 2012 09:16:35 +0800 [thread overview]
Message-ID: <20120105011634.GA32160@ladygaga> (raw)
In-Reply-To: <4F0469B3.9080400@parrot.com>
On Wed, Jan 04, 2012 at 04:01:07PM +0100, Matthieu CASTET wrote:
> Hi,
>
> our controller set "Max Block Length" to 3 (4096 byte), but the linux driver
> ignore this value [1].
>
> Is there any reason to do that .
The reason is, sd host controller spec defines 3 as reserved, not 4096.
> Or it is code that was written with an older sdhci spec, and we can ignore this
> check today.
The current sdhci driver follows v3 spec, is the v4 spec out that
defined this bit?
>
>
>
> Matthieu
>
> PS : please keep me in CC.
>
> [1]
> if (mmc->max_blk_size >= 3) {
> pr_warning("%s: Invalid maximum block size, "
> "assuming 512 bytes\n", mmc_hostname(mmc));
> mmc->max_blk_size = 0;
> }
> --
next prev parent reply other threads:[~2012-01-05 1:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-04 15:01 sdhci max_blk_size Matthieu CASTET
2012-01-05 1:16 ` Aaron Lu [this message]
2012-01-05 12:46 ` Matthieu CASTET
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