Enable minimal per-device resume tracing
This is the minimal resume trace code to find which device resume (if
any) results in problems. Usually, you'd use the information this
generates as a starting point to adding more fine-grained trace event
points.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/base/power/resume.c b/drivers/base/power/resume.c
index 317edbf..520679c 100644
--- a/drivers/base/power/resume.c
+++ b/drivers/base/power/resume.c
@@ -9,6 +9,7 @@
*/
#include <linux/device.h>
+#include <linux/resume-trace.h>
#include "../base.h"
#include "power.h"
@@ -23,6 +24,8 @@
{
int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_RESUME(0);
down(&dev->sem);
if (dev->power.pm_parent
&& dev->power.pm_parent->power.power_state.event) {
@@ -36,6 +39,7 @@
error = dev->bus->resume(dev);
}
up(&dev->sem);
+ TRACE_RESUME(error);
return error;
}