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mmc: mediatek: correct the implementation of msdc_card_busy 

msdc_card_busy only need check if the data0 is low.
In sdio data1 irq mode, data1 may be low because of interruption.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
yong mao 2017-01-03 16:49:57 +08:00 committed by Ulf Hansson
parent e9acc77dd0
commit 3bc702ed21
1 changed files with 2 additions and 5 deletions
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7
drivers/mmc/host/mtk-sd.c
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@ -1075,11 +1075,8 @@ static int msdc_card_busy(struct mmc_host *mmc)
struct msdc_host *host = mmc_priv(mmc);
u32 status = readl(host->base + MSDC_PS);
/* check if any pin between dat[0:3] is low */
if (((status >> 16) & 0xf) != 0xf)
return 1;
return 0;
/* only check if data0 is low */
return !(status & BIT(16));
}
static void msdc_request_timeout(struct work_struct *work)