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[v2,04/47] staging: mmal-vchiq: Fix client_component for 64 bit kernel

Message ID 20200629150945.10720-5-nsaenzjulienne@suse.de (mailing list archive)
State Mainlined
Commit 22e64b486adc4785542f8002c3af4c895490f841
Headers show
Series staging: vchiq: Getting rid of the vchi/vchiq split | expand

Commit Message

Nicolas Saenz Julienne June 29, 2020, 3:09 p.m. UTC 
From: Dave Stevenson <dave.stevenson@raspberrypi.org>

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>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 8 +++++++-
 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
index 6404d4e60350..3bc04f2ea53a 100644
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -943,7 +943,7 @@  static int create_component(struct vchiq_mmal_instance *instance,
 
 	/* build component create message */
 	m.h.type = MMAL_MSG_TYPE_COMPONENT_CREATE;
-	m.u.component_create.client_component = (u32)(unsigned long)component;
+	m.u.component_create.client_component = component->client_component;
 	strncpy(m.u.component_create.name, name,
 		sizeof(m.u.component_create.name));
 
@@ -1662,6 +1662,12 @@  int vchiq_mmal_component_init(struct vchiq_mmal_instance *instance,
 		goto unlock;
 	}
 
+	/* We need a handle to reference back to our component structure.
+	 * Use the array index in instance->component rather than rolling
+	 * another IDR.
+	 */
+	component->client_component = idx;
+
 	ret = create_component(instance, component, name);
 	if (ret < 0) {
 		pr_err("%s: failed to create component %d (Not enough GPU mem?)\n",
diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h
index df608585063b..1dc81ecf9268 100644
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h
@@ -92,6 +92,7 @@  struct vchiq_mmal_component {
 	struct vchiq_mmal_port input[MAX_PORT_COUNT]; /* input ports */
 	struct vchiq_mmal_port output[MAX_PORT_COUNT]; /* output ports */
 	struct vchiq_mmal_port clock[MAX_PORT_COUNT]; /* clock ports */
+	u32 client_component;	/* Used to ref back to client struct */
 };
 
 int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance);