[U-Boot] [PATCH 1/2] mmc: dw_mmc: transfer proper bytes to FIFO

[Ziyuan Xu]

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 at rock-chips.com>
---

 drivers/mmc/dw_mmc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 2cf7bae..38d4a64 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -126,6 +126,7 @@ 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);
@@ -139,6 +140,7 @@ 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++);
-- 
1.9.1