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dmaengine: altera-msgdma: use irq variant of spin_lock/unlock while invoking callbacks 

[ Upstream commit 261d3a85d959841821ca0d69f9d7b0d4087661c4 ]

As we first take the lock with spin_lock_irqsave in msgdma_tasklet, Lockdep
might complain about this. Inspired by commit 9558cf4ad0
("dmaengine: zynqmp_dma: fix lockdep warning in tasklet")

Signed-off-by: Olivier Dautricourt <olivierdautricourt@gmail.com>
Tested-by: Olivier Dautricourt <olivierdautricourt@gmail.com>
Suggested-by: Eric Schwarz <eas@sw-optimization.com>
Link: https://lore.kernel.org/r/20240608213216.25087-1-olivierdautricourt@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Olivier Dautricourt 2024-06-08 23:31:46 +02:00 committed by Greg Kroah-Hartman
parent 9d56712647
commit cd3851ef3f
1 changed files with 3 additions and 2 deletions
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5
drivers/dma/altera-msgdma.c
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@ -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 */