power management: change /sys/power/disk display
Change /sys/power/disk to display all valid modes as well as the currently
selected one in a fashion known from the LED subsystem.
This changes userspace API, but it is apparently not used much (we asked
some userspace developers)
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index e518379..0633137 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -350,7 +350,34 @@
static ssize_t disk_show(struct kset *kset, 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;
}