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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-03-03 01:33:34 +0300 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2016-03-23 19:11:02 +0300 |
| commit | bea307c16a3a297f87c7ab9a54de686da2afbad5 (patch) | |
| tree | d97b9c88778598de9928795b860270634bce8792 /drivers/pwm/pwm-img.c | |
| parent | 92e963f50fc74041b5e9e744c330dca48e04f08d (diff) | |
| download | linux-bea307c16a3a297f87c7ab9a54de686da2afbad5.tar.xz | |
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/pwm-img.c')
| -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; |