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firmware: fix detecting error on register_reboot_notifier()

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register_reboot_notifier() can fail, detect this and address this
failure. This has been broken since v3.11, however the chances of
this failing here is really low.

Fixes: fe304143b0 ("firmware: Avoid deadlock of usermodehelper lock at shutdown")
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Luis R. Rodriguez 2017-11-20 09:45:34 -08:00 committed by Greg Kroah-Hartman
parent 6bb9cf3aa3
commit 561a10b6a1
1 changed files with 8 additions and 1 deletions
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9
drivers/base/firmware_class.c
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@ -1860,8 +1860,15 @@ static int __init firmware_class_init(void)
if (ret)
return ret;
register_reboot_notifier(&fw_shutdown_nb);
ret = register_reboot_notifier(&fw_shutdown_nb);
if (ret)
goto out;
return register_sysfs_loader();
out:
unregister_fw_pm_ops();
return ret;
}
static void __exit firmware_class_exit(void)