This is a note to let you know that I've just added the patch titled dmaengine: xilinx: dpdma: Fix race condition in done IRQ to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dmaengine-xilinx-dpdma-fix-race-condition-in-done-ir.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 651e0a8415a20f963dd712ab8c6635be041f4b4f Author: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Date: Sun Mar 7 06:06:29 2021 +0200 dmaengine: xilinx: dpdma: Fix race condition in done IRQ [ Upstream commit 868833fbffbe51c487df4f95d4de9194264a4b30 ] The active descriptor pointer is accessed from different contexts, including different interrupt handlers, and its access must be protected by the channel's lock. This wasn't done in the done IRQ handler. Fix it. Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210307040629.29308-3-laurent.pinchart@xxxxxxxxxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_dpdma.c index d504112c609e..70b29bd079c9 100644 --- a/drivers/dma/xilinx/xilinx_dpdma.c +++ b/drivers/dma/xilinx/xilinx_dpdma.c @@ -1048,13 +1048,14 @@ static int xilinx_dpdma_chan_stop(struct xilinx_dpdma_chan *chan) */ static void xilinx_dpdma_chan_done_irq(struct xilinx_dpdma_chan *chan) { - struct xilinx_dpdma_tx_desc *active = chan->desc.active; + struct xilinx_dpdma_tx_desc *active; unsigned long flags; spin_lock_irqsave(&chan->lock, flags); xilinx_dpdma_debugfs_desc_done_irq(chan); + active = chan->desc.active; if (active) vchan_cyclic_callback(&active->vdesc); else