linux-next: build failure after merge of the drm-misc tree

Stephen Rothwell
2024-02-06T04:28:54Z

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Hi all,

After merging the drm-misc tree, today's linux-next build (i386 defconfig)
failed like this:

In function 'i915_ttm_placement_from_obj',
inlined from 'i915_ttm_get_pages' at drivers/gpu/drm/i915/gem/i915_gem_ttm.c:847:2:
drivers/gpu/drm/i915/gem/i915_gem_ttm.c:165:18: error: 'places[0].flags' is used uninitialized [-Werror=uninitialized]
165 | places[0].flags |= TTM_PL_FLAG_DESIRED;
| ~~~~~~~~~^~~~~~
drivers/gpu/drm/i915/gem/i915_gem_ttm.c: In function 'i915_ttm_get_pages':
drivers/gpu/drm/i915/gem/i915_gem_ttm.c:837:26: note: 'places' declared here
837 | struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1];
| ^~~~~~

Caused by commit

a78a8da51b36 ("drm/ttm: replace busy placement with flags v6")

I applied the following hack for today:

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 6 Feb 2024 15:17:54 +1100
Subject: [PATCH] drm/ttm: initialise places

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index 80c6cafc8887..34e699e67c25 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -834,7 +834,7 @@ static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,

static int i915_ttm_get_pages(struct drm_i915_gem_object *obj)
{
- struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1];
+ struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1] = {};
struct ttm_placement placement;

/* restricted by sg_alloc_table */
--
2.43.0

--
Cheers,
Stephen Rothwell

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