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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 <eric.long@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
hifive-unleashed-5.1
Eric Long 2018-11-06 13:01:34 +08:00 committed by Vinod Koul
parent 13e8997924
commit 0e5d7b1eb6
1 changed files with 1 additions and 0 deletions
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drivers/dma/sprd-dma.c
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@ -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,