diff options
| -rw-r--r-- | drivers/dma/intel_mid_dma.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c index 373396c462a0..c4b81387f0c6 100644 --- a/drivers/dma/intel_mid_dma.c +++ b/drivers/dma/intel_mid_dma.c @@ -817,9 +817,14 @@ static void dma_tasklet2(unsigned long data) static irqreturn_t intel_mid_dma_interrupt(int irq, void *data) { struct middma_device *mid = data; - u32 status; + u32 tfr_status, err_status; int call_tasklet = 0; + tfr_status = ioread32(mid->dma_base + RAW_TFR); + err_status = ioread32(mid->dma_base + RAW_ERR); + if (!tfr_status && !err_status) + return IRQ_NONE; + /*DMA Interrupt*/ pr_debug("MDMA:Got an interrupt on irq %d\n", irq); if (!mid) { @@ -827,19 +832,17 @@ static irqreturn_t intel_mid_dma_interrupt(int irq, void *data) return -EINVAL; } - status = ioread32(mid->dma_base + RAW_TFR); - pr_debug("MDMA: Status %x, Mask %x\n", status, mid->intr_mask); - status &= mid->intr_mask; - if (status) { + pr_debug("MDMA: Status %x, Mask %x\n", tfr_status, mid->intr_mask); + tfr_status &= mid->intr_mask; + if (tfr_status) { /*need to disable intr*/ - iowrite32((status << 8), mid->dma_base + MASK_TFR); - pr_debug("MDMA: Calling tasklet %x\n", status); + iowrite32((tfr_status << 8), mid->dma_base + MASK_TFR); + pr_debug("MDMA: Calling tasklet %x\n", tfr_status); call_tasklet = 1; } - status = ioread32(mid->dma_base + RAW_ERR); - status &= mid->intr_mask; - if (status) { - iowrite32(MASK_INTR_REG(status), mid->dma_base + MASK_ERR); + err_status &= mid->intr_mask; + if (err_status) { + iowrite32(MASK_INTR_REG(err_status), mid->dma_base + MASK_ERR); call_tasklet = 1; } if (call_tasklet) |