Commit 8827f85e authored by Jack Wang's avatar Jack Wang Committed by Ulf Hansson
Browse files

mmc: jz4740_mmc: Fix error check for dma_map_sg 



dma_map_sg return 0 on error.

Signed-off-by: default avatarJack Wang <jinpu.wang@ionos.com>
Acked-by: default avatarPaul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20220825074008.33349-3-jinpu.wang@ionos.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent f7865ad8

drivers/mmc/host/jz4740_mmc.c

+2 −2
Original line number Diff line number Diff line
@@ -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;