diff options
| author | David Brownell <david-b@pacbell.net> | 2005-05-09 08:07:00 -0700 |
|---|---|---|
| committer | Greg KH <gregkh@suse.de> | 2005-05-17 14:54:54 -0700 |
| commit | 82428b62aa6294ea640c7e920a9224ecaf46db65 (patch) | |
| tree | f9e9bfd1f86f739ee16968378057060417f52bb4 /drivers/base/power/suspend.c | |
| parent | ff0d2f90fdc4b564d47a7c26b16de81a16cfa28e (diff) | |
| download | linux-82428b62aa6294ea640c7e920a9224ecaf46db65.tar.bz2 | |
[PATCH] Driver Core: pm diagnostics update, check for errors
This patch includes various tweaks in the messaging that appears during
system pm state transitions:
* Warn about certain illegal calls in the device tree, like resuming
child before parent or suspending parent before child. This could
happen easily enough through sysfs, or in some cases when drivers
use device_pm_set_parent().
* Be more consistent about dev_dbg() tracing ... do it for resume() and
shutdown() too, and never if the driver doesn't have that method.
* Say which type of system sleep state is being entered.
Except for the warnings, these only affect debug messaging.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/power/suspend.c')
| -rw-r--r-- | drivers/base/power/suspend.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c index a0b5cf689e63..0ec44ef840be 100644 --- a/drivers/base/power/suspend.c +++ b/drivers/base/power/suspend.c @@ -39,12 +39,25 @@ int suspend_device(struct device * dev, pm_message_t state) { int error = 0; - dev_dbg(dev, "suspending\n"); + if (dev->power.power_state) { + dev_dbg(dev, "PM: suspend %d-->%d\n", + dev->power.power_state, state); + } + if (dev->power.pm_parent + && dev->power.pm_parent->power.power_state) { + dev_err(dev, + "PM: suspend %d->%d, parent %s already %d\n", + dev->power.power_state, state, + dev->power.pm_parent->bus_id, + dev->power.pm_parent->power.power_state); + } dev->power.prev_state = dev->power.power_state; - if (dev->bus && dev->bus->suspend && !dev->power.power_state) + if (dev->bus && dev->bus->suspend && !dev->power.power_state) { + dev_dbg(dev, "suspending\n"); error = dev->bus->suspend(dev, state); + } return error; } |