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mmc: renesas_sdhi: Fix alignment check of sg buffer 

Sometimes sg->offset is not used for buffer addresses allocated by
dma_map_sg(), so alignment checks should be done on the allocated buffer
addresses. Delete the alignment check for sg->offset that is done before
dma_map_sg(). Instead, it performs the alignment check for
sg->dma_address after dma_map_sg().

Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
[Niklas: broke this commit in two and tidied small style issue]
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
[rebased to mmc/next]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Masaharu Hayakawa 2018-04-18 20:20:59 +02:00 committed by Ulf Hansson
parent a028b435bf
commit ae275b9d60
1 changed files with 9 additions and 8 deletions
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17
drivers/mmc/host/renesas_sdhi_internal_dmac.c
View File

@ -157,15 +157,21 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
{
struct scatterlist *sg = host->sg_ptr;
u32 dtran_mode = DTRAN_MODE_BUS_WID_TH | DTRAN_MODE_ADDR_MODE;
int ret;
/* This DMAC cannot handle if sg_len is not 1 */
WARN_ON(host->sg_len > 1);
/* This DMAC cannot handle if buffer is not 8-bytes alignment */
if (!IS_ALIGNED(sg->offset, 8))
if (!dma_map_sg(&host->pdev->dev, sg, host->sg_len,
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)) {
dma_unmap_sg(&host->pdev->dev, sg, host->sg_len,
mmc_get_dma_dir(data));
goto force_pio;
}
if (data->flags & MMC_DATA_READ) {
dtran_mode |= DTRAN_MODE_CH_NUM_CH1;
if (test_bit(SDHI_INTERNAL_DMAC_ONE_RX_ONLY, &global_flags) &&
@ -175,11 +181,6 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
dtran_mode |= DTRAN_MODE_CH_NUM_CH0;
}
ret = dma_map_sg(&host->pdev->dev, sg, host->sg_len,
mmc_get_dma_dir(data));
if (ret == 0)
goto force_pio;
renesas_sdhi_internal_dmac_enable_dma(host, true);
/* set dma parameters */