staging: vchiq_arm: use state from vchiq instance

In 'handle_to_service', access the vchiq state from the vchiq instance
instead of the global 'vchiq_states' array. This will allow getting rid
of the global 'vchiq_states' array.
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Adrien Thierry <athierry@redhat.com>
Link: https://lore.kernel.org/r/20220518191126.60396-9-athierry@redhat.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c

@@ -13,6 +13,7 @@
 #include <linux/rcupdate.h>
 #include <linux/sched/signal.h>
 
+#include "vchiq_arm.h"
 #include "vchiq_core.h"
 
 #define VCHIQ_SLOT_HANDLER_STACK 8192
@@ -234,6 +235,12 @@ set_service_state(struct vchiq_service *service, int newstate)
 	service->srvstate = newstate;
 }
 
+struct vchiq_service *handle_to_service(struct vchiq_instance *instance, unsigned int handle)
+{
+	int idx = handle & (VCHIQ_MAX_SERVICES - 1);
+
+	return rcu_dereference(instance->state->services[idx]);
+}
 struct vchiq_service *
 find_service_by_handle(struct vchiq_instance *instance, unsigned int handle)
 {

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h

@@ -508,17 +508,7 @@ extern void
 request_poll(struct vchiq_state *state, struct vchiq_service *service,
 	     int poll_type);
 
-static inline struct vchiq_service *
-handle_to_service(struct vchiq_instance *instance, unsigned int handle)
-{
-	int idx = handle & (VCHIQ_MAX_SERVICES - 1);
-	struct vchiq_state *state = vchiq_states[(handle / VCHIQ_MAX_SERVICES) &
-		(VCHIQ_MAX_STATES - 1)];
-
-	if (!state)
-		return NULL;
-	return rcu_dereference(state->services[idx]);
-}
+struct vchiq_service *handle_to_service(struct vchiq_instance *instance, unsigned int handle);
 
 extern struct vchiq_service *
 find_service_by_handle(struct vchiq_instance *instance, unsigned int handle);