| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 147/156] IB/mlx5: avoid destroying a NULL mr in reg_user_mr error flow | Date | Tue, 20 Oct 2015 14:38:08 -0700 |
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3.19.8-ckt8 -stable review patch. If anyone has any objections, please let me know.
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From: Haggai Eran <haggaie@mellanox.com>
commit 11d748045c6dadb279d1acdb6d2ea8f3f2ede85b upstream.
The mlx5_ib_reg_user_mr() function will attempt to call clean_mr() in its error flow even though there is never a case where the error flow occurs with a valid MR pointer to destroy.
Remove the clean_mr() call and the incorrect comment above it.
Fixes: b4cfe447d47b ("IB/mlx5: Implement on demand paging by adding support for MMU notifiers") Cc: Eli Cohen <eli@mellanox.com> Signed-off-by: Haggai Eran <haggaie@mellanox.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/infiniband/hw/mlx5/mr.c | 12 ------------ 1 file changed, 12 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 32a28bd..e8b669f 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -1118,19 +1118,7 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, return &mr->ibmr; error: - /* - * Destroy the umem *before* destroying the MR, to ensure we - * will not have any in-flight notifiers when destroying the - * MR. - * - * As the MR is completely invalid to begin with, and this - * error path is only taken if we can't push the mr entry into - * the pagefault tree, this is safe. - */ - ib_umem_release(umem); - /* Kill the MR, and return an error code. */ - clean_mr(mr); return ERR_PTR(err); } -- 1.9.1
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