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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>
This commit is contained in:
Jie Yang 2015-03-05 14:08:08 +08:00 committed by Vinod Koul
parent 1eed601a5b
commit 94b3eed7b8
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/dw/core.c
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@ -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); dev_vdbg(dw->dma.dev, "%s: status=0x%x\n", __func__, status);
/* Check if we have any interrupt from the DMAC */ /* Check if we have any interrupt from the DMAC */
if (!status) if (!status || !dw->in_use)
return IRQ_NONE; return IRQ_NONE;
/* /*