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Date: Tue, 24 Jan 2017 08:55:12 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Eli Cohen <eli@...lanox.com>, Maor Gottlieb <maorg@...lanox.com>, Leon Romanovsky <leon@...nel.org>, Doug Ledford <dledford@...hat.com> Subject: [PATCH 4.4 02/42] IB/mlx5: Wait for all async command completions to complete 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eli Cohen <eli@...lanox.com> commit acbda523884dcf45613bf6818d8ead5180df35c2 upstream. Wait before continuing unload till all pending mkey async creation requests are done. Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters') Signed-off-by: Eli Cohen <eli@...lanox.com> Signed-off-by: Maor Gottlieb <maorg@...lanox.com> Signed-off-by: Leon Romanovsky <leon@...nel.org> Signed-off-by: Doug Ledford <dledford@...hat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/infiniband/hw/mlx5/mr.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -614,6 +614,33 @@ int mlx5_mr_cache_init(struct mlx5_ib_de return 0; } +static void wait_for_async_commands(struct mlx5_ib_dev *dev) +{ + struct mlx5_mr_cache *cache = &dev->cache; + struct mlx5_cache_ent *ent; + int total = 0; + int i; + int j; + + for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) { + ent = &cache->ent[i]; + for (j = 0 ; j < 1000; j++) { + if (!ent->pending) + break; + msleep(50); + } + } + for (i = 0; i < MAX_MR_CACHE_ENTRIES; i++) { + ent = &cache->ent[i]; + total += ent->pending; + } + + if (total) + mlx5_ib_warn(dev, "aborted while there are %d pending mr requests\n", total); + else + mlx5_ib_warn(dev, "done with all pending requests\n"); +} + int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev) { int i; @@ -627,6 +654,7 @@ int mlx5_mr_cache_cleanup(struct mlx5_ib clean_keys(dev, i); destroy_workqueue(dev->cache.wq); + wait_for_async_commands(dev); del_timer_sync(&dev->delay_timer); return 0;
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