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

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Date:   Fri, 19 Aug 2022 08:07:59 +0200
From:   Jack Wang <jinpu.wang@...os.com>
To:     linux-kernel@...r.kernel.org
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org
Subject: [PATCH v1 17/19] mmc: meson-mx-sdhc: Fix error check for dma_map_sg

dma_map_sg return 0 on error.

Cc: Ulf Hansson <ulf.hansson@...aro.org>
Cc: Neil Armstrong <narmstrong@...libre.com>
Cc: Kevin Hilman <khilman@...libre.com>
Cc: Jerome Brunet <jbrunet@...libre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: linux-mmc@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-amlogic@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org

Signed-off-by: Jack Wang <jinpu.wang@...os.com>
---
 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