drivers: watchdog: stm32 wwdg check callback before calling

FRASTM · kartben · commit c32b481413c4 · 2025-08-18T13:07:00.000+02:00
Check that the callback function exists before calling it
inside the ISR.

Signed-off-by: Francois Ramu &lt;francois.ramu@st.com&gt;
diff --git a/drivers/watchdog/wdt_wwdg_stm32.c b/drivers/watchdog/wdt_wwdg_stm32.c
@@ -265,7 +265,9 @@ void wwdg_stm32_isr(const struct device *dev)
 	if (LL_WWDG_IsEnabledIT_EWKUP(wwdg)) {
 		if (LL_WWDG_IsActiveFlag_EWKUP(wwdg)) {
 			LL_WWDG_ClearFlag_EWKUP(wwdg);
-			data->callback(dev, 0);
+			if (data->callback != NULL) {
+				data->callback(dev, 0);
+			}
 		}
 	}
 }

Original file line number	Diff line number	Diff line change
`@@ -265,7 +265,9 @@ void wwdg_stm32_isr(const struct device *dev)`
`265`	`265`	`if (LL_WWDG_IsEnabledIT_EWKUP(wwdg)) {`
`266`	`266`	`if (LL_WWDG_IsActiveFlag_EWKUP(wwdg)) {`
`267`	`267`	`LL_WWDG_ClearFlag_EWKUP(wwdg);`
`268`		`- data->callback(dev, 0);`
	`268`	`+ if (data->callback != NULL) {`
	`269`	`+ data->callback(dev, 0);`
	`270`	`+ }`
`269`	`271`	`}`
`270`	`272`	`}`
`271`	`273`	`}`