From 2d5b71006c6a93e26eb86b7efd37440c020bab46 Mon Sep 17 00:00:00 2001 From: Samin Guo Date: Wed, 17 Nov 2021 14:50:45 +0800 Subject: [PATCH 1003/1024] 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(-) --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -382,11 +382,13 @@ static void axi_chan_block_xfer_start(st 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); @@ -1028,6 +1030,14 @@ static noinline void axi_chan_handle_err 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); --- 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; };