From 80bb6c581bf5e2a81ea6e1c17aa4babb4a1bf7a7 Mon Sep 17 00:00:00 2001
From: Leonard Crestez <leonard.crestez@nxp.com>
Date: Thu, 31 Oct 2019 23:34:19 +0200
Subject: [PATCH] PM / devfreq: Set scaling_max_freq to max on OPP notifier
 error

commit e7cc792d00049c874010b398a27c3cc7bc8fef34 upstream.

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@nxp.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 61c3badad950..9f995ed5fb67 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);
 
-- 
2.7.4