Commit 13e89979 authored Nov 06, 2018 by Eric Long Committed by Vinod Koul Dec 05, 2018

dmaengine: sprd: Fix the last link-list configuration



We will pass sglen as 0 configure the last link-list configuration
when filling the descriptor, which will cause the incorrect link-list
configuration. Thus we should check if the sglen is 0 to configure
the correct link-list configuration.

Signed-off-by: Eric Long <eric.long@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

parent d762ab33

drivers/dma/sprd-dma.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -697,7 +697,8 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
		hw->cfg \|= SPRD_DMA_LINKLIST_EN;

		/* link-list index */
		temp = (sg_index + 1) % sglen;
		temp = sglen ? (sg_index + 1) % sglen : 0;

		/* Next link-list configuration's physical address offset */
		temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR;
		/*

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