amdkfd: add __iomem attribute to doorbell_ptr

This patch was done due to sparse warning. It changes the definition of
doorbell_ptr in queue_properties to be with __iomem attribute, so it would
match the type which the doorbell module functions are returning.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c

@@ -66,8 +66,7 @@ static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
 	if (kq->mqd == NULL)
 		return false;
 
-	prop.doorbell_ptr =
-		(uint32_t *)kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
+	prop.doorbell_ptr = kfd_get_kernel_doorbell(dev, &prop.doorbell_off);
 
 	if (prop.doorbell_ptr == NULL)
 		goto err_get_kernel_doorbell;
@@ -172,7 +171,7 @@ static bool initialize(struct kernel_queue *kq, struct kfd_dev *dev,
 	kfd2kgd->free_mem(dev->kgd, (struct kgd_mem *) kq->pq);
 err_pq_allocate_vidmem:
 	pr_err("kfd: error init pq\n");
-	kfd_release_kernel_doorbell(dev, (u32 *)prop.doorbell_ptr);
+	kfd_release_kernel_doorbell(dev, prop.doorbell_ptr);
 err_get_kernel_doorbell:
 	pr_err("kfd: error init doorbell");
 	return false;
@@ -195,7 +194,7 @@ static void uninitialize(struct kernel_queue *kq)
 	kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->wptr_mem);
 	kfd2kgd->free_mem(kq->dev->kgd, (struct kgd_mem *) kq->pq);
 	kfd_release_kernel_doorbell(kq->dev,
-				(u32 *)kq->queue->properties.doorbell_ptr);
+					kq->queue->properties.doorbell_ptr);
 	uninit_queue(kq->queue);
 }
 
@@ -255,7 +254,7 @@ static void submit_packet(struct kernel_queue *kq)
 #endif
 
 	*kq->wptr_kernel = kq->pending_wptr;
-	write_kernel_doorbell((u32 *)kq->queue->properties.doorbell_ptr,
+	write_kernel_doorbell(kq->queue->properties.doorbell_ptr,
 				kq->pending_wptr);
 }
 

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

@@ -279,7 +279,7 @@ struct queue_properties {
 	uint32_t queue_percent;
 	uint32_t *read_ptr;
 	uint32_t *write_ptr;
-	uint32_t *doorbell_ptr;
+	uint32_t __iomem *doorbell_ptr;
 	uint32_t doorbell_off;
 	bool is_interop;
 	bool is_active;