tegra20-apb-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>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index f137914..5d4986e 100644 (file)
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -767,13 +767,11 @@ static enum dma_status tegra_dma_tx_status(struct dma_chan *dc,
        unsigned long flags;
        unsigned int residual;
 
-       spin_lock_irqsave(&tdc->lock, flags);
-
        ret = dma_cookie_status(dc, cookie, txstate);
-       if (ret == DMA_SUCCESS) {
-               spin_unlock_irqrestore(&tdc->lock, flags);
+       if (ret == DMA_SUCCESS)
                return ret;
-       }
+
+       spin_lock_irqsave(&tdc->lock, flags);
 
        /* Check on wait_ack desc status */
        list_for_each_entry(dma_desc, &tdc->free_dma_desc, node) {