drm/i915/gem: Suppress some random warnings

Leave the error propagation in place, but limit the warnings to only
show up in CI if the unlikely errors are hit.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200525141957.3061-2-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c

@@ -1626,8 +1626,7 @@ eb_relocate_entry(struct i915_execbuffer *eb,
 			err = i915_vma_bind(target->vma,
 					    target->vma->obj->cache_level,
 					    PIN_GLOBAL, NULL);
-			if (drm_WARN_ONCE(&i915->drm, err,
-				      "Unexpected failure to bind target VMA!"))
+			if (err)
 				return err;
 		}
 	}

drivers/gpu/drm/i915/gem/i915_gem_phys.c

@@ -29,8 +29,7 @@ static int i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
 	void *dst;
 	int i;
 
-	if (drm_WARN_ON(obj->base.dev,
-			i915_gem_object_needs_bit17_swizzle(obj)))
+	if (GEM_WARN_ON(i915_gem_object_needs_bit17_swizzle(obj)))
 		return -EINVAL;
 
 	/*

drivers/gpu/drm/i915/gem/i915_gem_shmem.c

@@ -147,8 +147,7 @@ static int shmem_get_pages(struct drm_i915_gem_object *obj)
 		last_pfn = page_to_pfn(page);
 
 		/* Check that the i965g/gm workaround works. */
-		drm_WARN_ON(&i915->drm,
-			    (gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL));
+		GEM_BUG_ON(gfp & __GFP_DMA32 && last_pfn >= 0x00100000UL);
 	}
 	if (sg) { /* loop terminated early; short sg table */
 		sg_page_sizes |= sg->length;

drivers/gpu/drm/i915/gem/i915_gem_userptr.c

@@ -235,7 +235,7 @@ i915_gem_userptr_init__mmu_notifier(struct drm_i915_gem_object *obj,
 	if (flags & I915_USERPTR_UNSYNCHRONIZED)
 		return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
 
-	if (drm_WARN_ON(obj->base.dev, obj->userptr.mm == NULL))
+	if (GEM_WARN_ON(!obj->userptr.mm))
 		return -EINVAL;
 
 	mn = i915_mmu_notifier_find(obj->userptr.mm);