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RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure

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mlx5r_umr_update_xlt() allocates and DMA maps an XLT buffer with
mlx5r_umr_create_xlt(). The buffer is released by the common cleanup path
through mlx5r_umr_unmap_free_xlt().

After mlx5_odp_populate_xlt() became fallible, its error path returned
directly and skipped that cleanup. This leaks the XLT DMA mapping and
buffer. If the emergency XLT page was used, it also leaves
xlt_emergency_page_mutex locked.

Break out of the loop so execution falls through the existing cleanup path.

Fixes: 1efe8c0670 ("RDMA/core: Convert UMEM ODP DMA mapping to caching IOVA and page linkage")
Signed-off-by: Prathamesh Deshpande <prathameshdeshpande7@gmail.com>
Link: https://patch.msgid.link/20260426132356.22264-1-prathameshdeshpande7@gmail.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Prathamesh Deshpande 2026-04-26 14:23:41 +01:00 committed by Leon Romanovsky
parent 7de165740c
commit 1eae35b379
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx5/umr.c
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@ -915,7 +915,7 @@ int mlx5r_umr_update_xlt(struct mlx5_ib_mr *mr, u64 idx, int npages,
*/
err = mlx5_odp_populate_xlt(xlt, idx, npages, mr, flags);
if (err)
return err;
break;
dma_sync_single_for_device(ddev, sg.addr, sg.length,
DMA_TO_DEVICE);
sg.length = ALIGN(size_to_map, MLX5_UMR_FLEX_ALIGNMENT);