From: Matthew Murrian matthew.murrian@goctsi.com
[ Upstream commit 96d5d884f78306206d745d856aad322becd100c3 ]
The SG capability is inherently present with Multichannel DMA operation. The register used to check for this capability with other DMA driver types is not defined for MCDMA.
Fixes: 6ccd692bfb7f ("dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support") Signed-off-by: Matthew Murrian matthew.murrian@goctsi.com Signed-off-by: Radhey Shyam Pandey radhey.shyam.pandey@xilinx.com Link: https://lore.kernel.org/r/1604473206-32573-4-git-send-email-radhey.shyam.pan... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/xilinx/xilinx_dma.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index f0662f6672ff9..0fc432567b857 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -2875,10 +2875,11 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev, chan->stop_transfer = xilinx_dma_stop_transfer; }
- /* check if SG is enabled (only for AXIDMA and CDMA) */ + /* check if SG is enabled (only for AXIDMA, AXIMCDMA, and CDMA) */ if (xdev->dma_config->dmatype != XDMA_TYPE_VDMA) { - if (dma_ctrl_read(chan, XILINX_DMA_REG_DMASR) & - XILINX_DMA_DMASR_SG_MASK) + if (xdev->dma_config->dmatype == XDMA_TYPE_AXIMCDMA || + dma_ctrl_read(chan, XILINX_DMA_REG_DMASR) & + XILINX_DMA_DMASR_SG_MASK) chan->has_sg = true; dev_dbg(chan->dev, "ch %d: SG %s\n", chan->id, chan->has_sg ? "enabled" : "disabled");