2 curr, residue = 0;
+	unsigned long flags;
 	bool passed = false;
 	bool cyclic = chan->cyclic_first != NULL;
 
@@ -779,6 +780,8 @@ static unsigned int mmp_pdma_residue(struct mmp_pdma_chan *chan,
 	else
 		curr = readl(chan->phy->base + DSADR(chan->phy->idx));
 
+	spin_lock_irqsave(&chan->desc_lock, flags);
+
 	list_for_each_entry(sw, &chan->chain_running, node) {
 		u32 start, end, len;
 
@@ -822,6 +825,7 @@ static unsigned int mmp_pdma_residue(struct mmp_pdma_chan *chan,
 			continue;
 
 		if (sw->async_tx.cookie == cookie) {
+			spin_unlock_irqrestore(&chan->desc_lock, flags);
 			return residue;
 		} else {
 			residue = 0;
@@ -829,6 +833,8 @@ static unsigned int mmp_pdma_residue(struct mmp_pdma_chan *chan,
 		}
 	}
 
+	spin_unlock_irqrestore(&chan->desc_lock, flags);
+
 	/* We should only get here in case of cyclic transactions */
 	return residue;
 }
-- 
2.43.0[PATCH 6.6.y] dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()Wenshan Lan <jetlan9@163.com> undefinedgregkh@linuxfoundation.org, stable@vger.kernel.org undefined undefined undefined undefined undefinedˆm†£}