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| author | Jason Gunthorpe <jgg@mellanox.com> | 2020-05-06 10:46:57 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-05-13 03:32:53 +0300 |
| commit | 09fb406a569b2f4b596048e1cfa2c92a35b8fc9b (patch) | |
| tree | 7c1343e29c17d6021430dd50fb9d724346a8055f /drivers/infiniband/core | |
| parent | 9767a27e1aeb462812e9f054c313180eeff0b5c3 (diff) | |
| download | linux-09fb406a569b2f4b596048e1cfa2c92a35b8fc9b.tar.xz | |
RDMA/cm: Add a note explaining how the timewait is eventually freed
The way the cm_timewait_info is converted into a work and then freed
is very subtle and surprising, add a note clarifying the lifetime
here.
Link: https://lore.kernel.org/r/20200506074701.9775-7-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/cm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 6a2a5f6e6d90..74c46b0272b9 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -1025,6 +1025,11 @@ static void cm_enter_timewait(struct cm_id_private *cm_id_priv) msecs_to_jiffies(wait_time)); spin_unlock_irqrestore(&cm.lock, flags); + /* + * The timewait_info is converted into a work and gets freed during + * cm_free_work() in cm_timewait_handler(). + */ + BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0); cm_id_priv->timewait_info = NULL; } |