diff options
| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-03-02 23:33:34 +0100 |
|---|---|---|
| committer |   Thierry Reding <thierry.reding@gmail.com> | 2016-03-23 17:11:02 +0100 |
| commit | bea307c16a3a297f87c7ab9a54de686da2afbad5 (patch) | |
| tree | d97b9c88778598de9928795b860270634bce8792 /drivers/pwm | |
| parent | Linux 4.5-rc1 (diff) | |
| download | linux-dev-bea307c16a3a297f87c7ab9a54de686da2afbad5.tar.xz linux-dev-bea307c16a3a297f87c7ab9a54de686da2afbad5.zip | |
pwm: img: Test clock rate to avoid division by 0
The clk API may return 0 on clk_get_rate(), so we should check the
result before using it as a divisor.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-img.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-img.c b/drivers/pwm/pwm-img.c index 8a029f9bc18c..2fb30deee345 100644 --- a/drivers/pwm/pwm-img.c +++ b/drivers/pwm/pwm-img.c @@ -237,6 +237,11 @@ static int img_pwm_probe(struct platform_device *pdev) } clk_rate = clk_get_rate(pwm->pwm_clk); + if (!clk_rate) { + dev_err(&pdev->dev, "pwm clock has no frequency\n"); + ret = -EINVAL; + goto disable_pwmclk; + } /* The maximum input clock divider is 512 */ val = (u64)NSEC_PER_SEC * 512 * pwm->data->max_timebase; |