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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 <stefan@agner.ch>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Stefan Agner 2015-06-07 21:46:10 +02:00 committed by Vinod Koul
parent b206d9a23a
commit 0fe25d6110
1 changed files with 5 additions and 4 deletions
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9
drivers/dma/fsl-edma.c
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@ -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"); fsl_edma->big_endian = of_property_read_bool(np, "big-endian");
INIT_LIST_HEAD(&fsl_edma->dma_dev.channels); 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); 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_PRIVATE, fsl_edma->dma_dev.cap_mask);
dma_cap_set(DMA_SLAVE, 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); dma_cap_set(DMA_CYCLIC, fsl_edma->dma_dev.cap_mask);