mpc512x_dma: remove useless use of lock

Accordingly to dma_cookie_status() description locking is not required.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index 2d95673..2fe4353 100644 (file)
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -556,15 +556,7 @@ static enum dma_status
 mpc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
               struct dma_tx_state *txstate)
 {
-       struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
-       enum dma_status ret;
-       unsigned long flags;
-
-       spin_lock_irqsave(&mchan->lock, flags);
-       ret = dma_cookie_status(chan, cookie, txstate);
-       spin_unlock_irqrestore(&mchan->lock, flags);
-
-       return ret;
+       return dma_cookie_status(chan, cookie, txstate);
 }
 
 /* Prepare descriptor for memory to memory copy */