drm/i915: Use error code as -E2BIG when the size of gem ttm object is too large

The ttm_bo_init_reserved() functions returns -ENOSPC if the size is too big
to add vma. The direct function that returns -ENOSPC is
drm_mm_insert_node_in_range().
To handle the same error as other code returning -E2BIG when the size is
too large, it converts return value to -E2BIG.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221228192252.917299-6-gwan-gyeong.mun@intel.com

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 5f3abe1bb7d7e970cc8949c3d9cc33fc0ca023c5..8bf40988a656c41417ae88fb176b3ebbae7737d4 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -1309,6 +1309,17 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
        ret = ttm_bo_init_reserved(&i915->bdev, i915_gem_to_ttm(obj), bo_type,
                                   &i915_sys_placement, page_size >> PAGE_SHIFT,
                                   &ctx, NULL, NULL, i915_ttm_bo_destroy);
+
+       /*
+        * XXX: The ttm_bo_init_reserved() functions returns -ENOSPC if the size
+        * is too big to add vma. The direct function that returns -ENOSPC is
+        * drm_mm_insert_node_in_range(). To handle the same error as other code
+        * that returns -E2BIG when the size is too large, it converts -ENOSPC to
+        * -E2BIG.
+        */
+       if (size >> PAGE_SHIFT > INT_MAX && ret == -ENOSPC)
+               ret = -E2BIG;
+
        if (ret)
                return i915_ttm_err_to_gem(ret);