watchdog: digicolor: Avoid division by zero

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clk_get_rate() could return 0.  Avoid a division by zero panic.

Since get_timeleft() cannot propagate errors, check the clock rate early
in probe() and cache the rate in the driver data as it is unlikely to
change at runtime.

Fixes: 336694a01d ("watchdog: digicolor: driver for Conexant Digicolor CX92755 SoC")
Cc: stable@vger.kernel.org
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Link: https://patch.msgid.link/20260913064851.8239-2-tzungbi@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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Tzung-Bi Shih 2026-09-13 14:48:49 +08:00 • committed by Guenter Roeck

parent 88f1136340

commit 400cb663ca

1 changed files with 9 additions and 4 deletions

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drivers/watchdog/digicolor_wdt.c

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