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authorJohannes Berg <johannes@sipsolutions.net>2007-05-01 02:09:53 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-01 03:40:40 +0400
commit11d77d0c01b80e44c7aceb21928508dafce774f9 (patch)
tree4952f15df4ea2fcdba824aec5689ee9c0c7ceb90 /Documentation/power/swsusp.txt
parentfe0c935a6cbf25d72a27c7a345df8a2151de0b74 (diff)
downloadlinux-11d77d0c01b80e44c7aceb21928508dafce774f9.tar.xz
power management: remove firmware disk mode
This patch removes the firmware disk suspend mode which is the wrong approach, it is supposed to be used for implementing firmware-based disk suspend but cannot actually be used for that. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: <linux-pm@lists.linux-foundation.org> Cc: David Brownell <david-b@pacbell.net> Cc: Len Brown <lenb@kernel.org> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/power/swsusp.txt')
-rw-r--r--Documentation/power/swsusp.txt14
1 files changed, 5 insertions, 9 deletions
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
index 0761ff6c57ed..c55bd5079b90 100644
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -156,8 +156,7 @@ instead set the PF_NOFREEZE process flag when creating the thread (and
be very careful).
-Q: What is the difference between "platform", "shutdown" and
-"firmware" in /sys/power/disk?
+Q: What is the difference between "platform" and "shutdown"?
A:
@@ -166,11 +165,8 @@ shutdown: save state in linux, then tell bios to powerdown
platform: save state in linux, then tell bios to powerdown and blink
"suspended led"
-firmware: tell bios to save state itself [needs BIOS-specific suspend
- partition, and has very little to do with swsusp]
-
-"platform" is actually right thing to do, but "shutdown" is most
-reliable.
+"platform" is actually right thing to do where supported, but
+"shutdown" is most reliable (except on ACPI systems).
Q: I do not understand why you have such strong objections to idea of
selective suspend.
@@ -388,8 +384,8 @@ while the system is asleep, maintaining the connection, using true sleep
modes like "suspend-to-RAM" or "standby". (Don't write "disk" to the
/sys/power/state file; write "standby" or "mem".) We've not seen any
hardware that can use these modes through software suspend, although in
-theory some systems might support "platform" or "firmware" modes that
-won't break the USB connections.
+theory some systems might support "platform" modes that won't break the
+USB connections.
Remember that it's always a bad idea to unplug a disk drive containing a
mounted filesystem. That's true even when your system is asleep! The