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[PATCH] pm: print name of failed suspend function

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Print more diagnostic info to help identify the source of power management
suspend failures.

Example:

usb_hcd_pci_suspend(): pci_set_power_state+0x0/0x1af() returns -22
pci_device_suspend(): usb_hcd_pci_suspend+0x0/0x11b() returns -22
suspend_device(): pci_device_suspend+0x0/0x34() returns -22

Work-in-progress.  It needs lots more suspend_report_result() calls sprinkled
everywhere.

Cc: Patrick Mochel <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Nigel Cunningham <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Andrew Morton 2006-03-23 01:38:34 -08:00 • committed by Greg Kroah-Hartman
commit 0266949205
5 changed files with 31 additions and 8 deletions
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12
drivers/base/power/suspend.c
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@ -10,6 +10,8 @@
#include <linux/vt_kern.h>
#include <linux/device.h>
#include <linux/kallsyms.h>
#include <linux/pm.h>
#include "../base.h"
#include "power.h"
@ -58,6 +60,7 @@ int suspend_device(struct device * dev, pm_message_t state)
if (dev->bus && dev->bus->suspend && !dev->power.power_state.event) {
dev_dbg(dev, "suspending\n");
error = dev->bus->suspend(dev, state);
suspend_report_result(dev->bus->suspend, error);
}
up(&dev->sem);
return error;
@ -169,3 +172,12 @@ int device_power_down(pm_message_t state)
EXPORT_SYMBOL_GPL(device_power_down);
void __suspend_report_result(const char *function, void *fn, int ret)
{
if (ret) {
printk(KERN_ERR "%s(): ", function);
print_fn_descriptor_symbol("%s() returns ", (unsigned long)fn);
printk("%d\n", ret);
}
}
EXPORT_SYMBOL_GPL(__suspend_report_result);