From: Chris Ball <cjb@laptop.org>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Balaji T K <balajitk@ti.com>,
linux-mmc@vger.kernel.org, loic.pallardy-ext@stericsson.com
Subject: Re: [PATCH] mmc: core: expose RPMB partition only for CMD23 capable host
Date: Mon, 28 Jan 2013 17:28:45 -0500 [thread overview]
Message-ID: <87vcah54de.fsf@laptop.org> (raw)
In-Reply-To: <510277AD.20907@ti.com> (Peter Ujfalusi's message of "Fri, 25 Jan 2013 13:16:45 +0100")
Hi,
On Fri, Jan 25 2013, Peter Ujfalusi wrote:
> On 01/25/2013 12:30 PM, Balaji T K wrote:
>> SET_BLOCK_COUNT CMD23 is needed for all access to RPMB partition.
>> If block count is not set by CMD23, all subsequent read/write commands
>> fail as per eMMC specification. So, If the host does not support CMD23,
>> do not expose RPMB partition.
>>
>> Accessing RPMB partition can cause hang / huge delay
>> for host which do not support CMD23.
>
> Can this patch make it's way to 3.8? Without this patch my OMAP4 board's eMMC
> is not accessible causing blkid (via udev) to time out and slowing down the
> boot process.
>
> Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Thanks, pushed to mmc-next for 3.8.
- Chris.
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
prev parent reply other threads:[~2013-01-28 22:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-25 11:30 [PATCH] mmc: core: expose RPMB partition only for CMD23 capable host Balaji T K
2013-01-25 12:16 ` Peter Ujfalusi
2013-01-28 22:28 ` Chris Ball [this message]
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