fsldma: 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>
Cc: Li Yang <leoli@freescale.com>
Cc: Zhang Wei <zw@zh-kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 49e8fbd..b3f3e90 100644 (file)
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -979,15 +979,7 @@ static enum dma_status fsl_tx_status(struct dma_chan *dchan,
                                        dma_cookie_t cookie,
                                        struct dma_tx_state *txstate)
 {
-       struct fsldma_chan *chan = to_fsl_chan(dchan);
-       enum dma_status ret;
-       unsigned long flags;
-
-       spin_lock_irqsave(&chan->desc_lock, flags);
-       ret = dma_cookie_status(dchan, cookie, txstate);
-       spin_unlock_irqrestore(&chan->desc_lock, flags);
-
-       return ret;
+       return dma_cookie_status(dchan, cookie, txstate);
 }
 
 /*----------------------------------------------------------------------------*/