From c1dcd814fbf75861f50dbdc7f043091d739bfc92 Mon Sep 17 00:00:00 2001 From: Samin Guo Date: Wed, 17 Nov 2021 14:50:45 +0800 Subject: dmaengine: dw-axi-dmac: Handle xfer start while non-idle Signed-off-by: Samin Guo Signed-off-by: Curry Zhang --- drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 12 +++++++++++- drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 1 + 2 files changed, 12 insertions(+), 1 deletion(-) 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 a86a81ff0caa..05acc4780758 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -427,11 +427,13 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan, u32 irq_mask; u8 lms = 0; /* Select AXI0 master for LLI fetching */ + chan->is_err = false; if (unlikely(axi_chan_is_hw_enable(chan))) { dev_err(chan2dev(chan), "%s is non-idle!\n", axi_chan_name(chan)); - return; + axi_chan_disable(chan); + chan->is_err = true; } axi_dma_enable(chan->chip); @@ -1073,6 +1075,14 @@ static noinline void axi_chan_handle_err(struct axi_dma_chan *chan, u32 status) axi_chan_name(chan)); goto out; } + if (chan->is_err) { + struct axi_dma_desc *desc = vd_to_axi_desc(vd); + + axi_chan_block_xfer_start(chan, desc); + chan->is_err = false; + goto out; + } + /* Remove the completed descriptor from issued list */ list_del(&vd->node); diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h index 454904d99654..1da80677cb87 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h @@ -50,6 +50,7 @@ struct axi_dma_chan { struct dma_slave_config config; enum dma_transfer_direction direction; bool cyclic; + bool is_err; /* these other elements are all protected by vc.lock */ bool is_paused; }; -- cgit v1.2.3