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Commit 3467365c authored by Takeshi Saito's avatar Takeshi Saito Committed by Greg Kroah-Hartman
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mmc: renesas_sdhi_internal_dmac: Fix DMA buffer alignment from 8 to 128-bytes 



[ Upstream commit d7aefb2887601cf1fc3f86f55d43b2c9aece5e8f ]

According to the latest datasheet, the internal DMAC buffer alignment
R-Car Gen3 SDHI HW should be 128-bytes. So, fix it.

Signed-off-by: default avatarTakeshi Saito <takeshi.saito.xv@renesas.com>
[shimoda: revise commit description, rebase]
Fixes: 2a68ea78 ("mmc: renesas-sdhi: add support for R-Car Gen3 SDHI DMAC")
Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/1608114572-1892-2-git-send-email-yoshihiro.shimoda.uh@renesas.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent aa1c3e15

drivers/mmc/host/renesas_sdhi_internal_dmac.c

+2 −2
Original line number Diff line number Diff line
@@ -180,8 +180,8 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, 
			mmc_get_dma_dir(data)))

		goto force_pio;



	/* This DMAC cannot handle if buffer is not 8-bytes alignment */

	if (!IS_ALIGNED(sg_dma_address(sg), 8))

	/* This DMAC cannot handle if buffer is not 128-bytes alignment */

	if (!IS_ALIGNED(sg_dma_address(sg), 128))

		goto force_pio_with_unmap;



	if (data->flags & MMC_DATA_READ) {