From: Eric Long Date: Tue, 6 Nov 2018 05:01:34 +0000 (+0800) Subject: dmaengine: sprd: Set cur_desc as NULL when free or terminate one dma channel X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=0e5d7b1eb6fc06d2f9287519e238fa13efb69cee;p=openwrt%2Fstaging%2Fblogic.git dmaengine: sprd: Set cur_desc as NULL when free or terminate one dma channel It will be failed to start one new transfer if the channel started one none interrupt transfer before, since we will only set the schan->cur_desc as NULL depending on the transfer interrupt now. Thus we should set schan->cur_desc as NULL when free or terminate one dma channel to avoid this issue. Signed-off-by: Eric Long Signed-off-by: Baolin Wang Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index e6a74dc7da95..1b39661cd17b 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -439,6 +439,7 @@ static void sprd_dma_stop(struct sprd_dma_chn *schan) sprd_dma_stop_and_disable(schan); sprd_dma_unset_uid(schan); sprd_dma_clear_int(schan); + schan->cur_desc = NULL; } static bool sprd_dma_check_trans_done(struct sprd_dma_desc *sdesc,