The patch titled
Subject: drm/i915: fix MAX_ORDER usage in i915_gem_object_get_pages_internal()
has been added to the -mm mm-unstable branch. Its filename is
drm-i915-fix-max_order-usage-in-i915_gem_object_get_pages_internal.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/drm-i915-fix-max_order-usage-in-i915_gem_object_get_pages_internal.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: drm/i915: fix MAX_ORDER usage in i915_gem_object_get_pages_internal()
Date: Wed, 15 Mar 2023 14:31:27 +0300
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@xxxxxxxxxxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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~drm-i915-fix-max_order-usage-in-i915_gem_object_get_pages_internal
+++ a/drivers/gpu/drm/i915/gem/i915_gem_internal.c
@@ -36,7 +36,7 @@ static int i915_gem_object_get_pages_int
struct sg_table *st;
struct scatterlist *sg;
unsigned int npages; /* restricted by sg_alloc_table */
- int max_order = MAX_ORDER;
+ int max_order = MAX_ORDER - 1;
unsigned int max_segment;
gfp_t gfp;
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
sparc-mm-fix-max_order-usage-in-tsb_grow.patch
um-fix-max_order-usage-in-linux_main.patch
floppy-fix-max_order-usage.patch
drm-i915-fix-max_order-usage-in-i915_gem_object_get_pages_internal.patch
genwqe-fix-max_order-usage.patch
perf-core-fix-max_order-usage-in-rb_alloc_aux_page.patch
mm-page_reporting-fix-max_order-usage-in-page_reporting_register.patch
mm-slub-fix-max_order-usage-in-calculate_order.patch
iommu-fix-max_order-usage-in-__iommu_dma_alloc_pages.patch
mm-treewide-redefine-max_order-sanely.patch
