Commit 88b386c0 authored Feb 14, 2013 by Andy Shevchenko Committed by Vinod Koul Feb 14, 2013

dma: of-dma: protect list write operation by spin_lock



It's possible to have an inconsistency in the list due to unprotected operation
on it. The patch adds a proper locking on the list operation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 7dd14525

drivers/dma/of-dma.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -118,7 +118,9 @@ int of_dma_controller_register(struct device_node *np,
		ofdma->use_count = 0;

		/* Now queue of_dma controller structure in list */
		spin_lock(&of_dma_lock);
		list_add_tail(&ofdma->of_dma_controllers, &of_dma_list);
		spin_unlock(&of_dma_lock);

		return 0;
		}