From mboxrd@z Thu Jan  1 00:00:00 1970
From: khilman@linaro.org (Kevin Hilman)
Date: Thu, 16 Jan 2014 10:29:40 -0800
Subject: [PATCH] mmc: dw_mmc: fix dw_mci_get_cd
In-Reply-To: <1389876527-13498-1-git-send-email-zhangfei.gao@linaro.org>
 (Zhangfei Gao's message of "Thu, 16 Jan 2014 20:48:47 +0800")
References: <1389839502-13046-1-git-send-email-zhangfei.gao@linaro.org>
 <1389876527-13498-1-git-send-email-zhangfei.gao@linaro.org>
Message-ID: <87y52fok4r.fsf@linaro.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Zhangfei Gao <zhangfei.gao@linaro.org> writes:

> Introduced from commit bf626e5550f24aec24975a0e85ad8e572ca76a6b
> CDETECT is ignored since negated return value of mmc_gpio_get_cd(mmc)
> can not be checked by IS_ERR_VALUE.
> Add spin_lock_bh(&host->lock) for atomic accessing DW_MMC_CARD_PRESENT,
> otherwise sd detect may occasionally fail.
>
> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
> Reported-by: Kevin Hilman <khilman@linaro.org>
> Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org>
> Tested-by: Sachin Kamat <sachin.kamat@linaro.org>

I didn't look at the patch in detail, but can at least confirm that
Arndale boots again in -next with this patch applied.

Tested-by: Kevin Hilman <khilman@linaro.org>

Kevin