As we first take the lock with spin_lock_irqsave in msgdma_tasklet, Lockdep
might complain about this. Inspired by commit 9558cf4ad07e
("dmaengine: zynqmp_dma: fix lockdep warning in tasklet")
Signed-off-by: Olivier Dautricourt <olivierdautricourt@xxxxxxxxx>
Tested-by: Olivier Dautricourt <olivierdautricourt@xxxxxxxxx>
Suggested-by: Eric Schwarz <eas@xxxxxxxxxxxxxxxxxxx>
---
drivers/dma/altera-msgdma.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c
index a8e3615235b8..160a465b06dd 100644
--- a/drivers/dma/altera-msgdma.c
+++ b/drivers/dma/altera-msgdma.c
@@ -583,6 +583,7 @@ static void msgdma_issue_pending(struct dma_chan *chan)
static void msgdma_chan_desc_cleanup(struct msgdma_device *mdev)
{
struct msgdma_sw_desc *desc, *next;
+ unsigned long irqflags;
list_for_each_entry_safe(desc, next, &mdev->done_list, node) {
struct dmaengine_desc_callback cb;
@@ -591,9 +592,9 @@ static void msgdma_chan_desc_cleanup(struct msgdma_device *mdev)
dmaengine_desc_get_callback(&desc->async_tx, &cb);
if (dmaengine_desc_callback_valid(&cb)) {
- spin_unlock(&mdev->lock);
+ spin_unlock_irqrestore(&mdev->lock, irqflags);
dmaengine_desc_callback_invoke(&cb, NULL);
- spin_lock(&mdev->lock);
+ spin_lock_irqsave(&mdev->lock, irqflags);
}
/* Run any dependencies, then free the descriptor */
--
2.45.0
