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path: root/drivers/base/power/main.c
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Diffstat (limited to 'drivers/base/power/main.c')
-rw-r--r--drivers/base/power/main.c44
1 files changed, 34 insertions, 10 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 8aa2443182d..1a216c114a0 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -23,8 +23,8 @@
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/resume-trace.h>
-#include <linux/rwsem.h>
#include <linux/interrupt.h>
+#include <linux/sched.h>
#include "../base.h"
#include "power.h"
@@ -172,6 +172,13 @@ static int pm_op(struct device *dev,
pm_message_t state)
{
int error = 0;
+ ktime_t calltime, delta, rettime;
+
+ if (initcall_debug) {
+ pr_info("calling %s+ @ %i\n",
+ dev_name(dev), task_pid_nr(current));
+ calltime = ktime_get();
+ }
switch (state.event) {
#ifdef CONFIG_SUSPEND
@@ -219,6 +226,14 @@ static int pm_op(struct device *dev,
default:
error = -EINVAL;
}
+
+ if (initcall_debug) {
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
+ error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ }
+
return error;
}
@@ -236,6 +251,13 @@ static int pm_noirq_op(struct device *dev,
pm_message_t state)
{
int error = 0;
+ ktime_t calltime, delta, rettime;
+
+ if (initcall_debug) {
+ pr_info("calling %s_i+ @ %i\n",
+ dev_name(dev), task_pid_nr(current));
+ calltime = ktime_get();
+ }
switch (state.event) {
#ifdef CONFIG_SUSPEND
@@ -283,6 +305,14 @@ static int pm_noirq_op(struct device *dev,
default:
error = -EINVAL;
}
+
+ if (initcall_debug) {
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ printk("initcall %s_i+ returned %d after %Ld usecs\n", dev_name(dev),
+ error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ }
+
return error;
}
@@ -341,14 +371,11 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
TRACE_DEVICE(dev);
TRACE_RESUME(0);
- if (!dev->bus)
- goto End;
-
- if (dev->bus->pm) {
+ if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "EARLY ");
error = pm_noirq_op(dev, dev->bus->pm, state);
}
- End:
+
TRACE_RESUME(error);
return error;
}
@@ -584,10 +611,7 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
- if (!dev->bus)
- return 0;
-
- if (dev->bus->pm) {
+ if (dev->bus && dev->bus->pm) {
pm_dev_dbg(dev, state, "LATE ");
error = pm_noirq_op(dev, dev->bus->pm, state);
}