dma: mmp_tdma: disable irq when disabling dma channel

mask dma irq when disabling dma channel, so that interrupt status
will not be set and interrupt won't come again.
Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Acked-by: Zhangfei Gao <zhangfei.gao@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/mmp_tdma.c

@@ -154,6 +154,10 @@ static void mmp_tdma_disable_chan(struct mmp_tdma_chan *tdmac)
 {
 	writel(readl(tdmac->reg_base + TDCR) & ~TDCR_CHANEN,
 					tdmac->reg_base + TDCR);
+
+	/* disable irq */
+	writel(0, tdmac->reg_base + TDIMR);
+
 	tdmac->status = DMA_SUCCESS;
 }