| Message ID | 1467387958-14559-3-git-send-email-lars@metafoo.de (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 0e0dfc0..7f0b9aa 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -270,6 +270,9 @@ static irqreturn_t axi_dmac_interrupt_handler(int irq, void *devid) unsigned int pending; pending = axi_dmac_read(dmac, AXI_DMAC_REG_IRQ_PENDING); + if (!pending) + return IRQ_NONE; + axi_dmac_write(dmac, AXI_DMAC_REG_IRQ_PENDING, pending); spin_lock(&dmac->chan.vchan.lock);
Return IRQ_NONE in the interrupt handler when it is called but no IRQs are pending. This allows the system to recover in case of an interrupt storm e.g. due to a wrong interrupt configuration setup. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> --- drivers/dma/dma-axi-dmac.c | 3 +++ 1 file changed, 3 insertions(+)