Re: [alsa-devel] [PATCH v2 1/5] dmaengine: mmp_tdma: add mmp tdma support

On Mon, 2012-06-11 at 18:04 +0800, Zhangfei Gao wrote:

+static int mmp_tdma_clear_chan_irq(struct mmp_tdma_chan *tdmac) +{

•   u32 reg = readl(tdmac->reg_base + TDISR);
  

•   if (reg & TDISR_COMP) {
  

•           /* clear irq */
  

•           reg &= ~TDISR_COMP;
  

•           writel(reg, tdmac->reg_base + TDISR);
  

•           return 0;
  

•   }
  

•   return -1;
  

+}

-1? Please return a proper linux error code.