[PATCH v1 17/19] mmc: meson-mx-sdhc: Fix error check for dma_map_sg

[Jack Wang]

dma_map_sg return 0 on error.

Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxx>
Cc: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
Cc: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Cc: linux-mmc@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-amlogic@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx>
---
 drivers/mmc/host/meson-mx-sdhc-mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/meson-mx-sdhc-mmc.c b/drivers/mmc/host/meson-mx-sdhc-mmc.c
index e92e63cb5641..b32364f20c32 100644
--- a/drivers/mmc/host/meson-mx-sdhc-mmc.c
+++ b/drivers/mmc/host/meson-mx-sdhc-mmc.c
@@ -388,7 +388,7 @@ static int meson_mx_sdhc_map_dma(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	dma_len = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
 			     mmc_get_dma_dir(data));
-	if (dma_len <= 0) {
+	if (!dma_len) {
 		dev_err(mmc_dev(mmc), "dma_map_sg failed\n");
 		return -ENOMEM;
 	}
-- 
2.34.1