diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c index 8f765e2d7c72..48de8d2b32f2 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -1016,6 +1016,11 @@ static void axi_chan_block_xfer_complete(struct axi_dma_chan *chan) /* The completed descriptor currently is in the head of vc list */ vd = vchan_next_desc(&chan->vc); + if (!vd) { + dev_err(chan2dev(chan), "BUG: %s, IRQ with no descriptors\n", + axi_chan_name(chan)); + goto out; + } if (chan->cyclic) { desc = vd_to_axi_desc(vd); @@ -1045,6 +1050,7 @@ static void axi_chan_block_xfer_complete(struct axi_dma_chan *chan) axi_chan_start_first_queued(chan); } +out: spin_unlock_irqrestore(&chan->vc.lock, flags); }