diff options
| author | Stefan Agner <stefan@agner.ch> | 2015-06-07 22:46:10 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-06-25 06:52:32 +0300 |
| commit | 0fe25d61102d44c5541b10e2bb8e6633665bc944 (patch) | |
| tree | 14620f5b5021896ac96fdbd073274dbb75a990f4 /drivers | |
| parent | b206d9a23ac71cb905f5fb6e0cd813406f89b678 (diff) | |
| download | linux-0fe25d61102d44c5541b10e2bb8e6633665bc944.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/fsl-edma.c | 9 |
1 files 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); |