Commit 90f83541 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Ulf Hansson
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mmc: uniphier-sd: avoid using broken DMA RX channel 



host->chan_rx is NULL when UNIPHIER_SD_CAP_BROKEN_DMA_RX quirk flag
is set. In this case, it should not set up DMA.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent b7ced877

drivers/mmc/host/uniphier-sd.c

+3 −0
Original line number Diff line number Diff line
@@ -252,6 +252,9 @@ static void uniphier_sd_internal_dma_start(struct tmio_mmc_host *host, 
	u32 dma_mode;

	int sg_len;



	if ((data->flags & MMC_DATA_READ) && !host->chan_rx)

		goto force_pio;



	if (WARN_ON(host->sg_len != 1))

		goto force_pio;