From: Heiner Kallweit hkallweit1@gmail.com
commit 87a2cbf02d7701255f9fcca7e5bd864a7bb397cf upstream.
state->period/duty are of type u64, and if their value is greater than UINT_MAX, then the cast to uint will cause problems. Fix this by changing the type of the respective local variables to u64.
Fixes: b79c3670e120 ("pwm: meson: Don't duplicate the polarity internally") Cc: stable@vger.kernel.org Suggested-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de Reviewed-by: Martin Blumenstingl martin.blumenstingl@googlemail.com Signed-off-by: Heiner Kallweit hkallweit1@gmail.com Signed-off-by: Thierry Reding thierry.reding@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pwm/pwm-meson.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
--- a/drivers/pwm/pwm-meson.c +++ b/drivers/pwm/pwm-meson.c @@ -156,8 +156,9 @@ static int meson_pwm_calc(struct meson_p const struct pwm_state *state) { struct meson_pwm_channel *channel = &meson->channels[pwm->hwpwm]; - unsigned int duty, period, pre_div, cnt, duty_cnt; + unsigned int pre_div, cnt, duty_cnt; unsigned long fin_freq; + u64 duty, period;
duty = state->duty_cycle; period = state->period; @@ -179,19 +180,19 @@ static int meson_pwm_calc(struct meson_p
dev_dbg(meson->chip.dev, "fin_freq: %lu Hz\n", fin_freq);
- pre_div = div64_u64(fin_freq * (u64)period, NSEC_PER_SEC * 0xffffLL); + pre_div = div64_u64(fin_freq * period, NSEC_PER_SEC * 0xffffLL); if (pre_div > MISC_CLK_DIV_MASK) { dev_err(meson->chip.dev, "unable to get period pre_div\n"); return -EINVAL; }
- cnt = div64_u64(fin_freq * (u64)period, NSEC_PER_SEC * (pre_div + 1)); + cnt = div64_u64(fin_freq * period, NSEC_PER_SEC * (pre_div + 1)); if (cnt > 0xffff) { dev_err(meson->chip.dev, "unable to get period cnt\n"); return -EINVAL; }
- dev_dbg(meson->chip.dev, "period=%u pre_div=%u cnt=%u\n", period, + dev_dbg(meson->chip.dev, "period=%llu pre_div=%u cnt=%u\n", period, pre_div, cnt);
if (duty == period) { @@ -204,14 +205,13 @@ static int meson_pwm_calc(struct meson_p channel->lo = cnt; } else { /* Then check is we can have the duty with the same pre_div */ - duty_cnt = div64_u64(fin_freq * (u64)duty, - NSEC_PER_SEC * (pre_div + 1)); + duty_cnt = div64_u64(fin_freq * duty, NSEC_PER_SEC * (pre_div + 1)); if (duty_cnt > 0xffff) { dev_err(meson->chip.dev, "unable to get duty cycle\n"); return -EINVAL; }
- dev_dbg(meson->chip.dev, "duty=%u pre_div=%u duty_cnt=%u\n", + dev_dbg(meson->chip.dev, "duty=%llu pre_div=%u duty_cnt=%u\n", duty, pre_div, duty_cnt);
channel->pre_div = pre_div;