vic: helper to know if a source is managed

Signed-nof -by: Federico Vaga <federico.vaga@cern.ch>

kernel/spec-vic.c

@@ -178,6 +178,23 @@ int spec_vic_irq_request(struct spec_dev *spec, struct fmc_device *fmc,
 	return -EINVAL;
 }
 
+int vic_is_managed(struct vic_irq_controller *vic, unsigned long id)
+{
+	int i, ret;
+
+	if (!vic)
+		return 0;
+
+	for (i = 0; i < VIC_MAX_VECTORS; i++) {
+		if (vic->vectors[i].saved_id != id)
+			continue;
+
+		ret = vic_readl(vic, VIC_REG_IMR) & (1 << i);
+		return !!ret;
+	}
+
+	return 0;
+}
 
 /*
  * vic_handler_count

kernel/spec.h

@@ -154,5 +154,6 @@ int spec_vic_irq_request(struct spec_dev *spec, struct fmc_device *fmc,
 			 unsigned long id, irq_handler_t handler);
 void spec_vic_irq_free(struct spec_dev *spec, unsigned long id);
 irqreturn_t spec_vic_irq_dispatch(struct spec_dev *spec);
+extern int vic_is_managed(struct vic_irq_controller *vic, unsigned long id);
 
 #endif /* __SPEC_H__ */