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dmaengine: ptdma: handle the cases based on DMA is complete 

There is a need to segregate the cases when DMA is complete or not.
In case if DMA is already complete there is no need to handle it
again and gracefully exit from the function.

Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Link: https://lore.kernel.org/r/1643814880-3882-3-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sanjay R Mehta 2022-02-02 09:14:40 -06:00 committed by Vinod Koul
parent 6fa7e0e836
commit b6ccf01975
1 changed files with 10 additions and 5 deletions
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15
drivers/dma/ptdma/ptdma-dmaengine.c
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@ -100,12 +100,17 @@ static struct pt_dma_desc *pt_handle_active_desc(struct pt_dma_chan *chan,
spin_lock_irqsave(&chan->vc.lock, flags); spin_lock_irqsave(&chan->vc.lock, flags);
if (desc) { if (desc) {
if (desc->status != DMA_ERROR) if (desc->status != DMA_COMPLETE) {
desc->status = DMA_COMPLETE; if (desc->status != DMA_ERROR)
desc->status = DMA_COMPLETE;
dma_cookie_complete(tx_desc); dma_cookie_complete(tx_desc);
dma_descriptor_unmap(tx_desc); dma_descriptor_unmap(tx_desc);
list_del(&desc->vd.node); list_del(&desc->vd.node);
} else {
/* Don't handle it twice */
tx_desc = NULL;
}
} }
desc = pt_next_dma_desc(chan); desc = pt_next_dma_desc(chan);