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mmc: dw_mmc: transfer proper bytes to FIFO

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The former implement, dw_mmc will push and pop the redundant data to
FIFO, we should transfer it according to the real size.

Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Xu Ziyuan 2016-07-28 10:25:47 +08:00 committed by Jaehoon Chung
parent 14bed52d27
commit 2990e07a33
1 changed files with 2 additions and 0 deletions
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2
drivers/mmc/dw_mmc.c
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@ -125,6 +125,7 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data)
len = dwmci_readl(host, DWMCI_STATUS);
len = (len >> DWMCI_FIFO_SHIFT) &
DWMCI_FIFO_MASK;
len = min(size, len);
for (i = 0; i < len; i++)
*buf++ =
dwmci_readl(host, DWMCI_DATA);
@ -138,6 +139,7 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data)
len = fifo_depth - ((len >>
DWMCI_FIFO_SHIFT) &
DWMCI_FIFO_MASK);
len = min(size, len);
for (i = 0; i < len; i++)
dwmci_writel(host, DWMCI_DATA,
*buf++);