staging: vchiq_2835_arm: drop enum vchiq_status

Replace the custom set of return values with proper Linux error codes.
As a result we need to initialize vchiq_status in vchiq_init_state.
Reviewed-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1619347863-16080-8-git-send-email-stefan.wahren@i2se.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c

@@ -169,21 +169,21 @@ int vchiq_platform_init(struct platform_device *pdev, struct vchiq_state *state)
 	return 0;
 }
 
-enum vchiq_status
+int
 vchiq_platform_init_state(struct vchiq_state *state)
 {
 	struct vchiq_2835_state *platform_state;
 
 	state->platform_state = kzalloc(sizeof(*platform_state), GFP_KERNEL);
 	if (!state->platform_state)
-		return VCHIQ_ERROR;
+		return -ENOMEM;
 
 	platform_state = (struct vchiq_2835_state *)state->platform_state;
 
 	platform_state->inited = 1;
 	vchiq_arm_init_state(state, &platform_state->arm_state);
 
-	return VCHIQ_SUCCESS;
+	return 0;
 }
 
 struct vchiq_arm_state*
@@ -211,7 +211,7 @@ remote_event_signal(struct remote_event *event)
 		writel(0, g_regs + BELL2); /* trigger vc interrupt */
 }
 
-enum vchiq_status
+int
 vchiq_prepare_bulk_data(struct vchiq_bulk *bulk, void *offset,
 			void __user *uoffset, int size, int dir)
 {
@@ -223,7 +223,7 @@ vchiq_prepare_bulk_data(struct vchiq_bulk *bulk, void *offset,
 				       : PAGELIST_WRITE);
 
 	if (!pagelistinfo)
-		return VCHIQ_ERROR;
+		return -ENOMEM;
 
 	bulk->data = pagelistinfo->dma_addr;
 
@@ -233,7 +233,7 @@ vchiq_prepare_bulk_data(struct vchiq_bulk *bulk, void *offset,
 	 */
 	bulk->remote_data = pagelistinfo;
 
-	return VCHIQ_SUCCESS;
+	return 0;
 }
 
 void

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

@@ -2162,9 +2162,9 @@ vchiq_init_state(struct vchiq_state *state, struct vchiq_slot_zero *slot_zero)
 {
 	struct vchiq_shared_state *local;
 	struct vchiq_shared_state *remote;
-	enum vchiq_status status;
+	enum vchiq_status status = VCHIQ_SUCCESS;
 	char threadname[16];
-	int i;
+	int i, ret;
 
 	if (vchiq_states[0]) {
 		pr_err("%s: VCHIQ state already initialized\n", __func__);
@@ -2246,8 +2246,8 @@ vchiq_init_state(struct vchiq_state *state, struct vchiq_slot_zero *slot_zero)
 
 	local->debug[DEBUG_ENTRIES] = DEBUG_MAX;
 
-	status = vchiq_platform_init_state(state);
-	if (status != VCHIQ_SUCCESS)
+	ret = vchiq_platform_init_state(state);
+	if (ret)
 		return VCHIQ_ERROR;
 
 	/*
@@ -3141,8 +3141,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle,
 	bulk->size = size;
 	bulk->actual = VCHIQ_BULK_ACTUAL_ABORTED;
 
-	if (vchiq_prepare_bulk_data(bulk, offset, uoffset, size, dir)
-			!= VCHIQ_SUCCESS)
+	if (vchiq_prepare_bulk_data(bulk, offset, uoffset, size, dir))
 		goto unlock_error_exit;
 
 	wmb();

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

@@ -644,7 +644,7 @@ vchiq_queue_message(unsigned int handle,
  * implementations must be provided.
  */
 
-extern enum vchiq_status
+extern int
 vchiq_prepare_bulk_data(struct vchiq_bulk *bulk, void *offset,
 			void __user *uoffset, int size, int dir);
 
@@ -679,7 +679,7 @@ vchiq_on_remote_use(struct vchiq_state *state);
 extern void
 vchiq_on_remote_release(struct vchiq_state *state);
 
-extern enum vchiq_status
+extern int
 vchiq_platform_init_state(struct vchiq_state *state);
 
 extern enum vchiq_status