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mmc: dw_mmc: Fix issue with uninitialized dma_slave_config
[ Upstream commit c3ff018 ] Depending on the DMA driver being used, the struct dma_slave_config may need to be initialized to zero for the unused data. For example, we have three DMA drivers using src_port_window_size and dst_port_window_size. If these are left uninitialized, it can cause DMA failures. For dw_mmc, this is probably not currently an issue but is still good to fix though. Fixes: 3fc7eae ("mmc: dw_mmc: Add external dma interface support") Cc: Shawn Lin <shawn.lin@rock-chips.com> Cc: Jaehoon Chung <jh80.chung@samsung.com> Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com> Cc: Vinod Koul <vkoul@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20210810081644.19353-2-tony@atomide.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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