linux-kernel - [PATCH V2] dma: mmp_tdma: disable irq when disabling dma channel

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Date:	Sat, 15 Jun 2013 12:51:48 +0800
From:	Qiao Zhou <zhouqiao@...vell.com>
To:	<djbw@...com>, <vinod.koul@...el.com>, <zhangfei.gao@...il.com>,
	<linux-kernel@...r.kernel.org>
CC:	Qiao Zhou <zhouqiao@...vell.com>
Subject: [PATCH V2] 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@...vell.com>
---
 drivers/dma/mmp_tdma.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 43d5a6c..9b93665 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/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;
 }
 
-- 
1.7.0.4

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