From mboxrd@z Thu Jan 1 00:00:00 1970 From: dirk.brandewie@gmail.com Subject: [PATCH 2/6] cpufreq: Only query drivers that implement cpufreq_driver.target() Date: Fri, 1 Feb 2013 10:45:36 -0800 Message-ID: <1359744343-18690-3-git-send-email-dirk.brandewie@gmail.com> References: <1359744343-18690-1-git-send-email-dirk.brandewie@gmail.com> Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; bh=+9j+RTvhdabSxnKxzwBvKnaN6QPhg6E0m5wFsTK6l7I=; b=bjYL19l8QmaGI28PlzZOU/UQ7aZa9MBnTsXtztTvC9V6BkoYwVy4XhD58mW/cIck1t YKjOYjxmNq6gofgK0AwRoKpjD2njkVyUF6f2qCRp23aep7TunESvotjPi7mQUCRMyClR KMY5P5pKPsgwMfBkYXfJsJb63YLxLnqjOdz+Jjwg1hEZwOk7iZ2oyybTPFuvc+ITG+e6 yGhyzVyTYFle0ZjHR0NZpsKxe4kc7RW3NW4iJ5OQ9Uub0+gHCCrJIF9M/WJhQuG6Zqkh 8v9VrhT/kcV515X6gSyERjP2dNJRJ3I5IlNqPyeFVO8cD60ozMx/px1y50wLYG3Yy/vI KILQ== In-Reply-To: <1359744343-18690-1-git-send-email-dirk.brandewie@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org, cpufreq@vger.kernel.org Cc: Dirk Brandewie , Dirk Brandewie From: Dirk Brandewie Scaling drivers that implement cpufreq_driver.setpolicy() have internal governors and may/will change the current operating frequency very frequently this will cause cpufreq_out_of_sync() to be called every time. Only call cpufreq_driver.get() for drivers that implement cpufreq_driver.target() Signed-off-by: Dirk Brandewie --- drivers/cpufreq/cpufreq.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 1c037f0..493cd50 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1794,7 +1794,7 @@ int cpufreq_update_policy(unsigned int cpu) /* BIOS might change freq behind our back -> ask driver for current freq and notify governors about a change */ - if (cpufreq_driver->get) { + if (cpufreq_driver->get && cpufreq_driver->target) { policy.cur = cpufreq_driver->get(cpu); if (!data->cur) { pr_debug("Driver did not initialize current freq"); -- 1.7.7.6