Re: [PATCH] drm/buddy: Modify duplicate list_splice_tail call

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Hi Christian,

On 2/16/2024 5:29 PM, Christian König wrote:


Am 16.02.24 um 12:46 schrieb Arunpravin Paneer Selvam:


On 2/16/2024 4:41 PM, Matthew Auld wrote:
On 16/02/2024 10:00, Arunpravin Paneer Selvam wrote:
Remove the duplicate list_splice_tail call when the
total_allocated < size condition is true.

Cc: <stable@xxxxxxxxxxxxxxx> # 6.7+
Fixes: 8746c6c9dfa3 ("drm/buddy: Fix alloc_range() error handling code")
Reported-by: Bert Karwatzki <spasswolf@xxxxxx>
Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
---
  drivers/gpu/drm/drm_buddy.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c1a99bf4dffd..c4222b886db7 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -538,13 +538,13 @@ static int __alloc_range(struct drm_buddy *mm,
          list_add(&block->left->tmp_link, dfs);
      } while (1);
  -    list_splice_tail(&allocated, blocks);
-
      if (total_allocated < size) {
          err = -ENOSPC;
          goto err_free;
      }
  +    list_splice_tail(&allocated, blocks);

Sigh. Can we extend the unit test(s) to catch this?
Sure, Let me check.

In the meantime I'm going to push this one to drm-misc-fixes.
Thank you!

Regards,
Christian.


Regards,
Arun.

Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>

+
      return 0;
    err_undo:

base-commit: a64056bb5a3215bd31c8ce17d609ba0f4d5c55ea






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