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Documentation:reference notifiers.txt in freezing-of-tasks.txt

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freezing-of-tasks.txt mentions firmware issues without mentioning the use
of the new notifier API to overcome them.  Here's an update.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oliver Neukum 2007-07-21 04:37:43 -07:00 committed by Linus Torvalds
parent d6269543ef
commit fccdb5ae7e
1 changed files with 5 additions and 3 deletions
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Documentation/power/freezing-of-tasks.txt
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@ -155,6 +155,8 @@ Suppose, however, that the firmware file is located on a filesystem accessible
only through another device that hasn't been resumed yet. In that case,
request_firmware() will fail regardless of whether or not the freezing of tasks
is used. Consequently, the problem is not really related to the freezing of
tasks, since it generally exists anyway. [The solution to this particular
problem is to keep the firmware in memory after it's loaded for the first time
and upload if from memory to the device whenever necessary.]
tasks, since it generally exists anyway.
A driver must have all firmwares it may need in RAM before suspend() is called.
If keeping them is not practical, for example due to their size, they must be
requested early enough using the suspend notifier API described in notifiers.txt.