pwm: ipq: Prevent potential 32-bit integer overflow in hi_div calculation

In ipq_pwm_get_state(), hi_div was calculated as:
  hi_div = hi_dur * (pre_div + 1);

hi_dur and (pre_div + 1) are both unsigned int (32-bit) values.
Evaluating their multiplication using 32-bit arithmetic before assigning to
the 64-bit u64 hi_div variable can overflow 32-bit unsigned math.

While effective_div explicitly uses (u64)(pwm_div + 1) * (pre_div + 1) to
prevent overflow, hi_div was missing the (u64) cast.

Fix this by casting hi_dur to (u64) before multiplication, matching the
precision used for effective_div.

Fixes: c436e3e9c265 ("pwm: Driver for qualcomm ipq6018 pwm block")
Signed-off-by: Surendra Singh Chouhan <kr494167@gmail.com>
Link: https://patch.msgid.link/20260724044854.33274-1-kr494167@gmail.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

0 files changed, 0 insertions, 0 deletions