From 7dbb837b585495cb4f52df724aa6c3a82fcd1ab3 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Tue, 22 Jan 2019 12:04:09 +0000
Subject: [PATCH 0148/1085] staging: mmal-vchiq: Fix client_component for 64
 bit kernel

The MMAL client_component field is used with the event
mechanism to allow the client to identify the component for
which the event is generated.
The field is only 32bits in size, therefore we can't use a
pointer to the component in a 64 bit kernel.

Component handles are already held in an array per VCHI
instance, so use the array index as the client_component handle
to avoid having to create a new IDR for this purpose.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -457,9 +457,9 @@ buffer_from_host(struct vchiq_mmal_insta
 static void event_to_host_cb(struct vchiq_mmal_instance *instance,
 			     struct mmal_msg *msg, u32 msg_len)
 {
-	/* FIXME: Not going to work on 64 bit */
+	int comp_idx = msg->u.event_to_host.client_component;
 	struct vchiq_mmal_component *component =
-		(struct vchiq_mmal_component *)msg->u.event_to_host.client_component;
+					&instance->component[comp_idx];
 	struct vchiq_mmal_port *port = NULL;
 	struct mmal_msg_context *msg_context;
 	u32 port_num = msg->u.event_to_host.port_num;
