[PATCH 05/10] debug-backtrace-not-choke-on-null-dev_blah.patch

[Andy Green]

Signed-off-by: Andy Green <andy at openmoko.com>
---

 drivers/base/core.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2683eac..49fdee2 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -42,6 +42,11 @@ int (*platform_notify_remove)(struct device * dev) = NULL;
  */
 const char *dev_driver_string(struct device *dev)
 {
+	if (!dev) {
+		printk(KERN_ERR"Null dev to dev_driver_string\n");
+		dump_stack();
+		return "*NULL*";
+	}
 	return dev->driver ? dev->driver->name :
 			(dev->bus ? dev->bus->name :
 			(dev->class ? dev->class->name : ""));