To resolve the race problem when terminating a cyclic transfer,
dmaengine calls vchan_terminate_vdesc() from the DMA terminate_all
function.
When configuring the CONFIG_DEBUG_LIST macro, it detects a list
corruption error in the vchan_dma_desc_free_list function, displaying
the following message: "[54.964702] list_del corruption. prev->next
should be ffffa0001395a0b8, but it was ffffa000180a7950".
This error occurs because the virt_dma_desc remains in the
vc->desc_issued list.To resolve this issue, the vchan_terminate_vdesc
function should remove the descriptor from vc->desc_issued and then
add it to vc->desc_terminated.
Signed-off-by: yi.shao <yi.shao@xxxxxxxxxxxxx>
---
drivers/dma/virt-dma.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
index e9f5250..eee97d2 100644
--- a/drivers/dma/virt-dma.h
+++ b/drivers/dma/virt-dma.h
@@ -146,6 +146,7 @@ static inline void vchan_terminate_vdesc(struct virt_dma_desc *vd)
{
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
+ list_del(&vd->node);
list_add_tail(&vd->node, &vc->desc_terminated);
if (vc->cyclic == vd)
--
2.7.4
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