From 0fe25d61102d44c5541b10e2bb8e6633665bc944 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Sun, 7 Jun 2015 21:46:10 +0200 Subject: [PATCH] dmaengine: fsl-edma: clear pending interrupts on initialization Clear pending interrupts before requesting interrupts and move interrupt initialization after channels have been initialized. This avoids a NULL pointer dereference panic when using kexec while DMA requests were running. Signed-off-by: Stefan Agner Signed-off-by: Vinod Koul --- drivers/dma/fsl-edma.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c index 09e2842d15ec..915eec3cc279 100644 --- a/drivers/dma/fsl-edma.c +++ b/drivers/dma/fsl-edma.c @@ -881,10 +881,6 @@ static int fsl_edma_probe(struct platform_device *pdev) } - ret = fsl_edma_irq_init(pdev, fsl_edma); - if (ret) - return ret; - fsl_edma->big_endian = of_property_read_bool(np, "big-endian"); INIT_LIST_HEAD(&fsl_edma->dma_dev.channels); @@ -900,6 +896,11 @@ static int fsl_edma_probe(struct platform_device *pdev) fsl_edma_chan_mux(fsl_chan, 0, false); } + edma_writel(fsl_edma, ~0, fsl_edma->membase + EDMA_INTR); + ret = fsl_edma_irq_init(pdev, fsl_edma); + if (ret) + return ret; + dma_cap_set(DMA_PRIVATE, fsl_edma->dma_dev.cap_mask); dma_cap_set(DMA_SLAVE, fsl_edma->dma_dev.cap_mask); dma_cap_set(DMA_CYCLIC, fsl_edma->dma_dev.cap_mask); -- 2.39.5