First, `dev' is dereferenced in dev_to_node(dev), suggesting that it
must be non-null. Later `dev' is checked against NULL, suggesting
the opposite. This patch adds a NULL check before its use.
Signed-off-by: Xi Wang <xi.w...@gmail.com>
---
mm/dmapool.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/mm/dmapool.c b/mm/dmapool.c
index c5ab33b..afbf88e 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -135,6 +135,7 @@ struct dma_pool *dma_pool_create(const char *name, struct
device *dev,
{
struct dma_pool *retval;
size_t allocation;
+ int node;
if (align == 0) {
align = 1;
@@ -159,7 +160,9 @@ struct dma_pool *dma_pool_create(const char *name, struct
device *dev,
return NULL;
}
- retval = kmalloc_node(sizeof(*retval), GFP_KERNEL, dev_to_node(dev));
+ node = dev ? dev_to_node(dev) : -1;
+
+ retval = kmalloc_node(sizeof(*retval), GFP_KERNEL, node);
if (!retval)
return retval;
--
1.7.10.4
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