tegra20-apb-dma: remove useless use of lock (0a0aee20) · Commits · 戴 / test

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:

drivers/dma/tegra20-apb-dma.c

+3 −5

Original line number	Diff line number	Diff line
		@@ -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) {