On 9/1/26 19:08, David Hu wrote:

From: David Hu xuehaohu@google.com

This series address two related issues in scatter-gather mapping, specifically for the MMIO based dma-buf mapping. The fixes ensure sgt mapping is correct, and proper for large MMIO regions.

Patch 1 fixes a silent integer overflow for mapping length exceeding 4G (Previously submitted as [PATCH v7] dma-buf: Fix silent overflow for phys vec to sgt) https://lore.kernel.org/all/20260609164047.486227-1-xuehaohu@google.com/

Patch 2 Splits sgl by largest page aligned chunk (Previously submitted as [PATCH v3] dma-buf: Split sgl by largest page-aligned chunk) https://lore.kernel.org/all/20260722233806.3922093-1-dhu@x6u.co/

*sigh* such issues are exactly the reason why I didn't wanted the dma-mapping stuff inside DMA-buf. That clearly doesn't belong here.

I'm going to push those fixes to drm-misc-next now, but when there are more issues like that will mark the code as abandoned and not maintained.

Regards, Christian.

Changes in v8:

• Combined the two patches into one unified series to avoid merge conflicts.
• Collected Reviewed-by tag from Leon Romanovsky for Patch 2.

David Hu (2): dma-buf: Fix silent overflow for phys vec to sgt dma-buf: Split sgl by largest page-aligned chunk

drivers/dma-buf/dma-buf-mapping.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-)

-- 2.55.0.897.gb25b4bd76c-goog