Commit 94b3eed7 authored Mar 05, 2015 by Jie Yang Committed by Vinod Koul Mar 05, 2015

dmaengine: dw: don't handle interrupt when dmaengine is not used



When dma controller is not used by any user and set off,
we should disble interrupt handler, at least the interrupt
reset part, for some subsystem, e.g. ADSP, may use the
dma in its own logic, here reset the interrupt may make
this subsystem work abnormally.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 1eed601a

drivers/dma/dw/core.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -626,7 +626,7 @@ static irqreturn_t dw_dma_interrupt(int irq, void *dev_id)
		dev_vdbg(dw->dma.dev, "%s: status=0x%x\n", __func__, status);

		/* Check if we have any interrupt from the DMAC */
		if (!status)
		if (!status \|\| !dw->in_use)
		return IRQ_NONE;

		/*

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