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.shevche...@linux.intel.com>
Acked-by: Rob Herring <rob.herr...@calxeda.com>
---
drivers/of/dma.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/of/dma.c b/drivers/of/dma.c
index 59631b2..1ae6120 100644
--- a/drivers/of/dma.c
+++ b/drivers/of/dma.c
@@ -117,7 +117,9 @@ 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;
}
--
1.7.10.4
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