Merge tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw...

[cascardo/linux.git] / drivers / dma / mv_xor.c

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 8eca90d..7938272 100644 (file)
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -191,12 +191,10 @@ static void mv_set_mode(struct mv_xor_chan *chan,
 
 static void mv_chan_activate(struct mv_xor_chan *chan)
 {
-       u32 activation;
-
        dev_dbg(mv_chan_to_devp(chan), " activate chan.\n");
-       activation = readl_relaxed(XOR_ACTIVATION(chan));
-       activation |= 0x1;
-       writel_relaxed(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)