From mboxrd@z Thu Jan  1 00:00:00 1970
From: b29396@freescale.com (Dong Aisheng)
Date: Tue, 24 Dec 2013 10:05:24 +0800
Subject: [PATCH 1/1] mmc: sdhci: fix lockdep error on tunning routine
In-Reply-To: <20131223122315.GJ26070@S2101-09.ap.freescale.net>
References: <1387797184-18958-1-git-send-email-b29396@freescale.com>
 <20131223122315.GJ26070@S2101-09.ap.freescale.net>
Message-ID: <20131224020521.GA23230@shlinux2.ap.freescale.net>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Mon, Dec 23, 2013 at 08:23:17PM +0800, Shawn Guo wrote:
> On Mon, Dec 23, 2013 at 07:13:04PM +0800, Dong Aisheng wrote:
> > It's strange that this issue did not happen on kernel 3.10.17 with the same
> > code.
> 
> Probably just because you did not turn on CONFIG_PROVE_LOCKING on your
> 3.10.17 kennel.
> 

I did turn it on for the test.

Regards
Dong Aisheng

> Shawn
> 
> > And looking at the code, before call spin_lock we already disable the mmc
> > controller irq, per on my understanding, the deadlock given by lockdep may not
> > be able to happen(pls fix me if wrong).
> > May the lockdep not track the specific irq disable?
> > Copy lockdep guy to comment.
> > ---
>