dma: mv_xor: Flush descriptors before activating a channel

[pandora-kernel.git] / drivers / dma / mv_xor.c

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 9a353c2..9b01145 100644 (file)
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -218,12 +218,10 @@ static void mv_set_mode(struct mv_xor_chan *chan,
 
 static void mv_chan_activate(struct mv_xor_chan *chan)
 {
-       u32 activation;
-
        dev_dbg(chan->device->common.dev, " activate chan.\n");
-       activation = __raw_readl(XOR_ACTIVATION(chan));
-       activation |= 0x1;
-       __raw_writel(activation, XOR_ACTIVATION(chan));
+
+       /* writel ensures all descriptors are flushed before activation */
+       writel(BIT(0), XOR_ACTIVATION(chan));
 }
 
 static char mv_chan_is_busy(struct mv_xor_chan *chan)