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xprtrdma: Add documenting comment for rpcrdma_buffer_destroy 

Make a note of the function's dependency on an earlier ib_drain_qp.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2018-12-19 11:00:37 -05:00 committed by Anna Schumaker
parent 995d312a28
commit af65ed404c
1 changed files with 8 additions and 0 deletions
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8
net/sunrpc/xprtrdma/verbs.c
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@ -1177,6 +1177,14 @@ rpcrdma_mrs_destroy(struct rpcrdma_buffer *buf)
dprintk("RPC: %s: released %u MRs\n", __func__, count);
}
/**
* rpcrdma_buffer_destroy - Release all hw resources
* @buf: root control block for resources
*
* ORDERING: relies on a prior ib_drain_qp :
* - No more Send or Receive completions can occur
* - All MRs, reps, and reqs are returned to their free lists
*/
void
rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
{