From: Dan Carpenter <dan.carpenter@oracle.com>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Lars-Peter Clausen <lars@metafoo.de>,
linux-kernel@vger.kernel.org,
devicetree-discuss@lists.ozlabs.org,
kernel-janitors@vger.kernel.org
Subject: [patch] driver-core: dev_to_node() should handle NULL pointers
Date: Fri, 20 Jul 2012 09:56:23 +0300 [thread overview]
Message-ID: <20120720065622.GA11710@elgon.mountain> (raw)
What prompted this patch is that in dma_pool_create() we call
dev_to_node() before checking whether "dev" is NULL. It looks like
there are places which call dma_pool_create() with a NULL pointer. An
example is in drivers/usb/gadget/amd5536udc.c.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Static checker fix.
diff --git a/include/linux/device.h b/include/linux/device.h
index aa7b3b4..c80e7a8d 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -714,7 +714,9 @@ int dev_set_name(struct device *dev, const char *name, ...);
#ifdef CONFIG_NUMA
static inline int dev_to_node(struct device *dev)
{
- return dev->numa_node;
+ if (dev)
+ return dev->numa_node;
+ return -1;
}
static inline void set_dev_node(struct device *dev, int node)
{
next reply other threads:[~2012-07-20 6:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-20 6:56 Dan Carpenter [this message]
2012-07-20 15:00 ` [patch] driver-core: dev_to_node() should handle NULL pointers Greg Kroah-Hartman
2012-07-20 15:18 ` Dan Carpenter
2012-08-16 17:23 ` Greg Kroah-Hartman
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