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RDMA/core: Document CM @event_handler function

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Code audit suggests that the RDMA CM event handler callback function is
_always_ invoked in a context that is safe to block. That's important for
consumer implementers to know, so document that in the comment before
rdma_create_id (where the handler function is set up by the consumer).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Chuck Lever 2018-09-04 11:45:14 -04:00 committed by Jason Gunthorpe
parent 273993509f
commit 4269024639
1 changed files with 5 additions and 1 deletions
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6
include/rdma/rdma_cm.h
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@ -152,7 +152,11 @@ struct rdma_cm_id *__rdma_create_id(struct net *net,
* @ps: RDMA port space.
* @qp_type: type of queue pair associated with the id.
*
* The id holds a reference on the network namespace until it is destroyed.
* Returns a new rdma_cm_id. The id holds a reference on the network
* namespace until it is destroyed.
*
* The event handler callback serializes on the id's mutex and is
* allowed to sleep.
*/
#define rdma_create_id(net, event_handler, context, ps, qp_type) \
__rdma_create_id((net), (event_handler), (context), (ps), (qp_type), \