This is a note to let you know that I've just added the patch titled RDMA/mlx5: Fix the flow of a miss in the allocation of a cache ODP MR to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: rdma-mlx5-fix-the-flow-of-a-miss-in-the-allocation-o.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 6d59f595775debd70ea144ea51e89ab050d53ed4 Author: Aharon Landau <aharonl@xxxxxxxxxx> Date: Tue Feb 15 19:55:30 2022 +0200 RDMA/mlx5: Fix the flow of a miss in the allocation of a cache ODP MR [ Upstream commit 2f0e60d5e9f96341a0c8a01be8878cdb3b29ff20 ] When an ODP MR cache entry is empty and trying to allocate it, increment the ent->miss counter and call to queue_adjust_cache_locked() to verify the entry is balanced. Fixes: aad719dcf379 ("RDMA/mlx5: Allow MRs to be created in the cache synchronously") Link: https://lore.kernel.org/r/09503e295276dcacc92cb1d8aef1ad0961c99dc1.1644947594.git.leonro@xxxxxxxxxx Signed-off-by: Aharon Landau <aharonl@xxxxxxxxxx> Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 22e2f4d79743..7bb1b9d0941c 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -580,6 +580,8 @@ struct mlx5_ib_mr *mlx5_mr_cache_alloc(struct mlx5_ib_dev *dev, ent = &cache->ent[entry]; spin_lock_irq(&ent->lock); if (list_empty(&ent->head)) { + queue_adjust_cache_locked(ent); + ent->miss++; spin_unlock_irq(&ent->lock); mr = create_cache_mr(ent); if (IS_ERR(mr))