diff options
| author |   Jie Yang <yang.jie@intel.com> | 2015-03-05 14:08:08 +0800 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2015-03-05 14:07:48 +0530 |
| commit | 94b3eed7b8a4311f56a86b36430e9068b596ada4 (patch) | |
| tree | 9235d958ed3e4d0cf5198b2fa0a406c29db27ce0 /drivers/dma/dw/core.c | |
| parent | dma: mmp-tdma: refine dma disable and dma-pos update (diff) | |
| download | linux-dev-94b3eed7b8a4311f56a86b36430e9068b596ada4.tar.xz linux-dev-94b3eed7b8a4311f56a86b36430e9068b596ada4.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/dma/dw/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 455b7a4f1e87..a8ad05291b27 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -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; /* |