drm/xe: Fix an IS_ERR() vs NULL bug in xe_tile_alloc_vram()

commit 6c9e64e83b22405622d1f47417cdb0d20d49ca35 upstream.

The xe_vram_region_alloc() function returns NULL on error.  It never
returns error pointers.  Update the error checking to match.

Fixes: 4b0a5f5ce784 ("drm/xe: Unify the initialization of VRAM regions")
Signed-off-by: Dan Carpenter <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Rodrigo Vivi <[email protected]>
Signed-off-by: Rodrigo Vivi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Dan Carpenter

drivers/gpu/drm/xe/xe_tile.c

@@ -116,8 +116,8 @@ int xe_tile_alloc_vram(struct xe_tile *tile)
 		return 0;
 
 	vram = xe_vram_region_alloc(xe, tile->id, XE_PL_VRAM0 + tile->id);
-	if (IS_ERR(vram))
-		return PTR_ERR(vram);
+	if (!vram)
+		return -ENOMEM;
 	tile->mem.vram = vram;
 
 	return 0;