The driver currently calculates the end address of cache flush operation for the DMA descriptors by adding cacheline size to the start address of the last DMA descriptor. This is not safe, as the cacheline size may be, in some unlikely cases, smaller than the DMA descriptor size. Replace the addition with roundup() applied on the end address of the last DMA descriptor to round it up to the nearest cacheline size multiple.

Signed-off-by: Marek Vasut marex@denx.de Cc: Jaehoon Chung jh80.chung@samsung.com Cc: Simon Glass sjg@chromium.org --- drivers/mmc/dw_mmc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index 7544b84ab6..901a860a24 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -70,15 +70,15 @@ static void dwmci_prepare_data(struct dwmci_host *host, dwmci_set_idma_desc(cur_idmac, flags, cnt, (ulong)bounce_buffer + (i * PAGE_SIZE));

+ cur_idmac++; if (blk_cnt <= 8) break; blk_cnt -= 8; - cur_idmac++; i++; } while(1);

data_end = (ulong)cur_idmac; - flush_dcache_range(data_start, data_end + ARCH_DMA_MINALIGN); + flush_dcache_range(data_start, roundup(data_end, ARCH_DMA_MINALIGN));

ctrl = dwmci_readl(host, DWMCI_CTRL); ctrl |= DWMCI_IDMAC_EN | DWMCI_DMA_EN;