[PATCH 2/2] mmc: jz4740_mmc: Fix error check for dma_map_sg
From: Jack Wang <jinpu.wang@ionos.com>
Date: 2022-08-25 07:40:29
dma_map_sg return 0 on error. Cc: Paul Cercueil <paul@crapouillou.net> Cc: Ulf Hansson <redacted> Cc: linux-mips@vger.kernel.org Cc: linux-mmc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Jack Wang <jinpu.wang@ionos.com> --- drivers/mmc/host/jz4740_mmc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
index b1d563b2ed1b..dc2db9c185ea 100644
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c@@ -298,7 +298,7 @@ static int jz4740_mmc_prepare_dma_data(struct jz4740_mmc_host *host, { struct dma_chan *chan = jz4740_mmc_get_dma_chan(host, data); enum dma_data_direction dir = mmc_get_dma_dir(data); - int sg_count; + unsigned int sg_count; if (data->host_cookie == COOKIE_PREMAPPED) return data->sg_count;
@@ -308,7 +308,7 @@ static int jz4740_mmc_prepare_dma_data(struct jz4740_mmc_host *host, data->sg_len, dir); - if (sg_count <= 0) { + if (!sg_count) { dev_err(mmc_dev(host->mmc), "Failed to map scatterlist for DMA operation\n"); return -EINVAL;
--
2.34.1