diff options
| author |   Dmitry Osipenko <digetx@gmail.com> | 2019-11-05 00:56:01 +0300 |
|---|---|---|
| committer |   Chanwoo Choi <cw00.choi@samsung.com> | 2019-11-06 12:04:00 +0900 |
| commit | 7296443b900e6a432da3d6b1a7862beb83946d19 (patch) | |
| tree | c3a10900f617563dbb970b78070261d578716206 /drivers/devfreq | |
| parent | PM / devfreq: tegra30: Keep interrupt disabled while governor is stopped (diff) | |
| download | linux-dev-7296443b900e6a432da3d6b1a7862beb83946d19.tar.xz linux-dev-7296443b900e6a432da3d6b1a7862beb83946d19.zip | |
PM / devfreq: tegra30: Handle possible round-rate error
The EMC clock rate rounding technically could fail, hence let's handle
the error cases properly.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/tegra30-devfreq.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c index a0a5f3f7b789..66dfa98d8c6b 100644 --- a/drivers/devfreq/tegra30-devfreq.c +++ b/drivers/devfreq/tegra30-devfreq.c @@ -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); |