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IB/mlx5: Don't take the rereg_mr fallback without a new translation

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Jumping to mlx5_ib_reg_user_mr() without IB_MR_REREG_TRANS set will use
garbage values for start, length, and iova. Recovering the original mr
parameters for ODP and DMABUF to properly recreate it is too hard in this
flow, so just fail it.

Fixes: ef3642c4f5 ("RDMA/mlx5: Fix error unwinds for rereg_mr")
Link: https://patch.msgid.link/r/1-v1-29ebd2c229b5+fd5-ib_mr_pd_jgg@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe 2026-06-03 22:27:40 -03:00
parent ea4f6f6c53
commit 55d339d200
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx5/mr.c
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@ -1198,7 +1198,7 @@ struct ib_mr *mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
}
/* DM or ODP MR's don't have a normal umem so we can't re-use it */
if (!mr->umem || is_odp_mr(mr) || is_dmabuf_mr(mr))
goto recreate;
return ERR_PTR(-EOPNOTSUPP);
/*
* Only one active MR can refer to a umem at one time, revoke