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authorAndrew Morton <akpm@osdl.org>2006-03-23 01:38:34 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-04-14 11:41:25 -0700
commit026694920579590c73b5c56705d543568ed5ad41 (patch)
tree1c3ad318fe65c5812dd33008af8e77389ee31c46 /drivers/base
parent372254018eb1b65ee69210d11686bfc65c8d84db (diff)
downloadop-kernel-dev-026694920579590c73b5c56705d543568ed5ad41.zip
op-kernel-dev-026694920579590c73b5c56705d543568ed5ad41.tar.gz
[PATCH] pm: print name of failed suspend function
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 <mochel@digitalimplant.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@suspend2.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/suspend.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index bdb6066..662209d 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -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);
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