This patch changes /sys/power/disk to display all valid modes
as well as the currently selected one in a fashion known from
the LED subsystem.
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
Documentation/power/interface.txt | 8 ++++++--
kernel/power/disk.c | 29 ++++++++++++++++++++++++++++-
2 files changed, 34 insertions(+), 3 deletions(-)
--- wireless-dev.orig/kernel/power/disk.c 2007-04-12 11:58:14.275366513 +0200
+++ wireless-dev/kernel/power/disk.c 2007-04-12 12:49:07.965366513 +0200
@@ -322,7 +322,34 @@ static const char * const pm_disk_modes[
static ssize_t disk_show(struct subsystem * subsys, char * buf)
{
- return sprintf(buf, "%s\n", pm_disk_modes[pm_disk_mode]);
+ int i;
+ char *start = buf;
+
+ for (i = PM_DISK_PLATFORM; i < PM_DISK_MAX; i++) {
+ if (!pm_disk_modes[i])
+ continue;
+ switch (i) {
+ case PM_DISK_SHUTDOWN:
+ case PM_DISK_REBOOT:
+ case PM_DISK_TEST:
+ case PM_DISK_TESTPROC:
+ break;
+ default:
+ if (pm_ops && pm_ops->enter &&
+ (i == pm_ops->pm_disk_mode))
+ break;
+ /* not a valid mode, continue with loop */
+ continue;
+ }
+ if (i == pm_disk_mode)
+ buf += sprintf(buf, "[%s]", pm_disk_modes[i]);
+ else
+ buf += sprintf(buf, "%s", pm_disk_modes[i]);
+ if (i+1 != PM_DISK_MAX)
+ buf += sprintf(buf, " ");
+ }
+ buf += sprintf(buf, "\n");
+ return buf-start;
}
--- wireless-dev.orig/Documentation/power/interface.txt 2007-04-12 11:58:14.285366513 +0200
+++ wireless-dev/Documentation/power/interface.txt 2007-04-12 11:58:15.895366513 +0200
@@ -34,8 +34,12 @@ for 5 seconds, resume devices, unfreeze
we are able to look in the log messages and work out, for example, which code
is being slow and which device drivers are misbehaving.
-Reading from this file will display what the mode is currently set
-to. Writing to this file will accept one of
+Reading from this file will display all supported modes and the currently
+selected one in brackets, for example
+
+ [shutdown] reboot test testproc
+
+Writing to this file will accept one of
'platform' (only if the platform supports it)
'shutdown'
_______________________________________________
linux-pm mailing list
linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linux-foundation.org/mailman/listinfo/linux-pm
