linux-kernel - [PATCH 1/4] PM / devfreq: reuse system workqueue machanism

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Date:   Mon,  9 Dec 2019 15:44:22 +0100
From:   Kamil Konieczny <k.konieczny@...sung.com>
To:     k.konieczny@...sung.com
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>
Subject: [PATCH 1/4] PM / devfreq: reuse system workqueue machanism

There is no need for creating another workqueue, it is enough
to reuse system_freezable_power_efficient one.

Signed-off-by: Kamil Konieczny <k.konieczny@...sung.com>
---
 drivers/devfreq/devfreq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 46a7ff7c2994..955949c6fc1f 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -1532,11 +1532,11 @@ static int __init devfreq_init(void)
 		return PTR_ERR(devfreq_class);
 	}
 
-	devfreq_wq = create_freezable_workqueue("devfreq_wq");
+	devfreq_wq = system_freezable_power_efficient_wq;
 	if (!devfreq_wq) {
 		class_destroy(devfreq_class);
-		pr_err("%s: couldn't create workqueue\n", __FILE__);
-		return -ENOMEM;
+		pr_err("%s: system_freezable_power_efficient_wq isn't initialized\n", __FILE__);
+		return -EINVAL;
 	}
 	devfreq_class->dev_groups = devfreq_groups;
 
-- 
2.24.0