From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Date: Wed, 15 Mar 2023 14:31:27 +0300
Subject: drm/i915: fix MAX_ORDER usage in i915_gem_object_get_pages_internal()
Git-commit: 50c00d2c686e52c0dd9b5bddc6727f6c442cbcc0
Patch-mainline: v6.4-rc1
References: jsc#PED-7167

MAX_ORDER is not inclusive: the maximum allocation order buddy allocator
can deliver is MAX_ORDER-1.

Fix MAX_ORDER usage in i915_gem_object_get_pages_internal().

Link: https://lkml.kernel.org/r/20230315113133.11326-5-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
 drivers/gpu/drm/i915/gem/i915_gem_internal.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/gem/i915_gem_internal.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_internal.c
@@ -37,7 +37,7 @@ static int i915_gem_object_get_pages_int
 	struct scatterlist *sg;
 	unsigned int sg_page_sizes;
 	unsigned int npages;
-	int max_order = MAX_ORDER;
+	int max_order = MAX_ORDER - 1;
 	unsigned int max_segment;
 	gfp_t gfp;