misc: rp1-pio: Fix parameter checks wihout client

Passing bad parameters to an API call without a pio pointer will cause a NULL pointer exception when the persistent error is set. Guard against that. Signed-off-by: Phil Elwell <[email protected]>
raspberrypi · Nov 25, 2024 · 05678eb · 05678eb
1 parent ae98140
commit 05678eb
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/linux/pio_rp1.h b/include/linux/pio_rp1.h
@@ -20,7 +20,7 @@
 #endif
 
 #define bad_params_if(client, test) \
-	({ bool f = (test); if (f) pio_set_error(client, -EINVAL); \
+	({ bool f = (test); if (f && client) pio_set_error(client, -EINVAL); \
 		if (f && PARAM_WARNINGS_ENABLED) WARN_ON((test)); \
 		f; })