From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Ball Subject: Re: [PATCH] mmc: core: expose RPMB partition only for CMD23 capable host Date: Mon, 28 Jan 2013 17:28:45 -0500 Message-ID: <87vcah54de.fsf@laptop.org> References: <1359113430-10951-1-git-send-email-balajitk@ti.com> <510277AD.20907@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from void.printf.net ([89.145.121.20]:49896 "EHLO void.printf.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755155Ab3A1W3W (ORCPT ); Mon, 28 Jan 2013 17:29:22 -0500 In-Reply-To: <510277AD.20907@ti.com> (Peter Ujfalusi's message of "Fri, 25 Jan 2013 13:16:45 +0100") Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Peter Ujfalusi Cc: Balaji T K , linux-mmc@vger.kernel.org, loic.pallardy-ext@stericsson.com 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 Thanks, pushed to mmc-next for 3.8. - Chris. -- Chris Ball One Laptop Per Child