This is a note to let you know that I've just added the patch titled PM / devfreq: Set scaling_max_freq to max on OPP notifier error to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pm-devfreq-set-scaling_max_freq-to-max-on-opp-notifi.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 12138e840a64b50d4e8f341112abaea61a56632f Author: Leonard Crestez <leonard.crestez@xxxxxxx> Date: Thu Oct 31 23:34:19 2019 +0200 PM / devfreq: Set scaling_max_freq to max on OPP notifier error [ Upstream commit e7cc792d00049c874010b398a27c3cc7bc8fef34 ] The devfreq_notifier_call functions will update scaling_min_freq and scaling_max_freq when the OPP table is updated. If fetching the maximum frequency fails then scaling_max_freq remains set to zero which is confusing. Set to ULONG_MAX instead so we don't need special handling for this case in other places. Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx> Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx> Reviewed-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index e5c2afdc7b7f..e185c8846916 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -560,8 +560,10 @@ static int devfreq_notifier_call(struct notifier_block *nb, unsigned long type, goto out; devfreq->scaling_max_freq = find_available_max_freq(devfreq); - if (!devfreq->scaling_max_freq) + if (!devfreq->scaling_max_freq) { + devfreq->scaling_max_freq = ULONG_MAX; goto out; + } err = update_devfreq(devfreq);