[PATCH 1/3] mmc: mmc_spi: Move argument check to the beginning of mmc_spi_sendcmd()

[Bin Meng <bmeng.cn@gmail.com>]

From: Bin Meng <bin.meng@windriver.com>

The argument check should happen before any transfer on the SPI lines.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 drivers/mmc/mmc_spi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/mmc_spi.c b/drivers/mmc/mmc_spi.c
index b1edb6a..85a2818 100644
--- a/drivers/mmc/mmc_spi.c
+++ b/drivers/mmc/mmc_spi.c
@@ -83,6 +83,9 @@ static int mmc_spi_sendcmd(struct udevice *dev,
 	      __func__, cmdidx, cmdarg, resp_type,
 	      resp_size, resp_match, resp_match_value);
 
+	if (!resp || !resp_size)
+		return 0;
+
 	cmdo[0] = 0xff;
 	cmdo[1] = MMC_SPI_CMD(cmdidx);
 	cmdo[2] = cmdarg >> 24;
@@ -98,9 +101,6 @@ static int mmc_spi_sendcmd(struct udevice *dev,
 	if (ret)
 		return ret;
 
-	if (!resp || !resp_size)
-		return 0;
-
 	debug("%s: cmd%d", __func__, cmdidx);
 
 	if (resp_match) {
-- 
2.7.4