[PATCH 6.6 113/132] dmaengine: altera-msgdma: use irq variant of spin_lock/unlock while invoking callbacks

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6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Olivier Dautricourt <olivierdautricourt@xxxxxxxxx>

[ Upstream commit 261d3a85d959841821ca0d69f9d7b0d4087661c4 ]

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>
Link: https://lore.kernel.org/r/20240608213216.25087-1-olivierdautricourt@xxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 4153c2edb049..8c479a3676fc 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 */
-- 
2.43.0







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