tree 10cab9080a722a191086f58b9f304329e8a8b942
parent e1866b33b1e89f077b7132daae3dfd9a594e9a1a
author Rafael J. Wysocki <rjw@sisk.pl> 1304705382 +0200
committer Rafael J. Wysocki <rjw@sisk.pl> 1305667157 +0200

PM: Print a warning if firmware is requested when tasks are frozen

Some drivers erroneously use request_firmware() from their ->resume()
(or ->thaw(), or ->restore()) callbacks, which is not going to work
unless the firmware has been built in.  This causes system resume to
stall until the firmware-loading timeout expires, which makes users
think that the resume has failed and reboot their machines
unnecessarily.  For this reason, make _request_firmware() print a
warning and return immediately with error code if it has been called
when tasks are frozen and it's impossible to start any new usermode
helpers.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Reviewed-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>