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Date: Mon, 20 Sep 2021 20:22:49 +0300 From: Dmitry Osipenko <digetx@...il.com> To: Thierry Reding <thierry.reding@...il.com>, Jonathan Hunter <jonathanh@...dia.com>, Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>, MyungJoo Ham <myungjoo.ham@...sung.com>, Stephen Boyd <sboyd@...nel.org>, Kyungmin Park <kyungmin.park@...sung.com>, Chanwoo Choi <cw00.choi@...sung.com> Cc: linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org Subject: [PATCH v2 4/4] PM / devfreq: tegra30: Check whether clk_round_rate() returns zero rate EMC clock is always-on and can't be zero. Check whether clk_round_rate() returns zero rate and error out if it does. It can return zero if clock tree isn't initialized properly. Acked-by: Chanwoo Choi <cw00.choi@...sung.com> Signed-off-by: Dmitry Osipenko <digetx@...il.com> --- drivers/devfreq/tegra30-devfreq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c index d83fdc2713ed..65ecf17a36f4 100644 --- a/drivers/devfreq/tegra30-devfreq.c +++ b/drivers/devfreq/tegra30-devfreq.c @@ -891,9 +891,9 @@ static int tegra_devfreq_probe(struct platform_device *pdev) return err; rate = clk_round_rate(tegra->emc_clock, ULONG_MAX); - if (rate < 0) { + if (rate <= 0) { dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate); - return rate; + return rate ?: -EINVAL; } tegra->max_freq = rate / KHZ; -- 2.32.0
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