PM / devfreq: tegra30: Handle possible round-rate error (7296443b) · Commits · 戴 / test

drivers/devfreq/tegra30-devfreq.c

+15 −2

Original line number	Diff line number	Diff line
		@@ -592,8 +592,8 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
		struct tegra_devfreq_device *dev;
		struct tegra_devfreq *tegra;
		struct devfreq *devfreq;
		unsigned long rate;
		unsigned int i;
		long rate;
		int err;

		tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
		@@ -650,8 +650,14 @@ static int tegra_devfreq_probe(struct platform_device *pdev)

		reset_control_deassert(tegra->reset);

		tegra->max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX) / KHZ;
		rate = clk_round_rate(tegra->emc_clock, ULONG_MAX);
		if (rate < 0) {
		dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate);
		return rate;
		}

		tegra->cur_freq = clk_get_rate(tegra->emc_clock) / KHZ;
		tegra->max_freq = rate / KHZ;

		for (i = 0; i < ARRAY_SIZE(actmon_device_configs); i++) {
		dev = tegra->devices + i;
		@@ -662,6 +668,13 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
		for (rate = 0; rate <= tegra->max_freq * KHZ; rate++) {
		rate = clk_round_rate(tegra->emc_clock, rate);

		if (rate < 0) {
		dev_err(&pdev->dev,
		"Failed to round clock rate: %ld\n", rate);
		err = rate;
		goto remove_opps;
		}

		err = dev_pm_opp_add(&pdev->dev, rate, 0);
		if (err) {
		dev_err(&pdev->dev, "Failed to add OPP: %d\n", err);