Re: [PATCH] watchdog: airoha: Prevent division by zero when clock frequency is zero

[Guenter Roeck]

On Wed, Jul 08, 2026 at 10:41:54AM +0800, Wayen Yan wrote:
> clk_get_rate() can return 0 when the clock provider is not properly
> configured or the clock is unmanaged. The driver uses wdt_freq as a
> divisor directly in airoha_wdt_probe() to compute max_timeout and in
> airoha_wdt_get_timeleft() to compute the remaining time, which results
> in a division by zero.
> 
> Add a check for wdt_freq == 0 in probe and return -EINVAL with
> dev_err_probe() to prevent the division by zero and provide a
> diagnostic message.
> 
> Fixes: 3cf67f3769b8 ("watchdog: Add support for Airoha EN7851 watchdog")
> Signed-off-by: Wayen Yan <win847@xxxxxxxxx>

Applied.

Thanks,
Guenter