[PATCH] mmc: return immediately once the dwmci data transfer fails

[linjunbao]

Originally, when the host is in dma mode, the return status of
dwmci_data_transfer() gets overlapped by the latter DWMCI_IDINTEN query.
When the data transfer fails and the query succeeds, the failure gets
escaped. Add quick return when data transfer fails.

Signed-off-by: linjunbao <meljbao at gmail.com>
---

 drivers/mmc/dw_mmc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index e103664145..e04872c432 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -372,6 +372,10 @@ static int dwmci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 
 	if (data) {
 		ret = dwmci_data_transfer(host, data);
+		if (ret) {
+			debug("DWMCI data transfer fail.\n");
+			return ret;
+		}
 
 		/* only dma mode need it */
 		if (!host->fifo_mode) {
-- 
2.25.1