Driver core: add CONFIG_DEBUG_DRIVER to help track down driver core bugs easier.

drivers/base/Kconfig

@@ -8,4 +8,15 @@ config FW_LOADER
 	  require hotplug firmware loading support, but a module built outside
 	  the kernel tree does.
 
+config DEBUG_DRIVER
+        bool "Driver Core verbose debug messages"
+        depends on DEBUG_KERNEL
+        help
+          Say Y here if you want the Driver core to produce a bunch of
+          debug messages to the system log. Select this if you are having a
+          problem with the driver core and want to see more of what is
+          going on.
+
+          If you are unsure about this, say N here.
+
 endmenu

drivers/base/bus.c

@@ -8,7 +8,10 @@
  *
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include <linux/module.h>

drivers/base/class.c

@@ -10,7 +10,10 @@
  *
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include <linux/module.h>

drivers/base/class_simple.c

@@ -8,7 +8,10 @@
  *
  */
 
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
 #define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include <linux/kdev_t.h>

drivers/base/core.c

@@ -8,7 +8,10 @@
  *
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include <linux/err.h>

drivers/base/driver.c

@@ -8,7 +8,10 @@
  *
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include <linux/module.h>

drivers/base/power/main.c

@@ -19,7 +19,10 @@
  * ancestral dependencies that the subsystem list maintains.
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include "power.h"

drivers/base/power/shutdown.c

@@ -8,7 +8,10 @@
  *
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/device.h>
 #include <asm/semaphore.h>
@@ -54,7 +57,7 @@ void device_shutdown(void)
 	
 	down_write(&devices_subsys.rwsem);
 	list_for_each_entry_reverse(dev,&devices_subsys.kset.list,kobj.entry) {
-		pr_debug("shutting down %s: ",dev->name);
+		pr_debug("shutting down %s: ",dev->bus_id);
 		if (dev->driver && dev->driver->shutdown) {
 			pr_debug("Ok\n");
 			dev->driver->shutdown(dev);

drivers/base/sys.c

@@ -12,7 +12,10 @@
  * add themselves as children of the system bus.
  */
 
-#undef DEBUG
+#include <linux/config.h>
+#ifdef CONFIG_DEBUG_DRIVER
+#define DEBUG	1
+#endif
 
 #include <linux/sysdev.h>
 #include <linux/err.h>