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svcrdma: Drain QP before freeing svcrdma_xprt 

If the server has forced a disconnect, the associated QP has not
been moved to the Error state, and thus Receives are still posted.

Ensure Receives (and any other outstanding WRs) are drained to
release resources that can be freed during teardown of the
svcrdma_xprt.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2016-05-04 10:53:30 -04:00 committed by J. Bruce Fields
parent 0319aafc95
commit 76ee8fd64a
1 changed files with 3 additions and 0 deletions
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3
net/sunrpc/xprtrdma/svc_rdma_transport.c
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@ -1180,6 +1180,9 @@ static void __svc_rdma_free(struct work_struct *work)
dprintk("svcrdma: %s(%p)\n", __func__, rdma); dprintk("svcrdma: %s(%p)\n", __func__, rdma);
if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))
ib_drain_qp(rdma->sc_qp);
/* We should only be called from kref_put */ /* We should only be called from kref_put */
if (atomic_read(&xprt->xpt_ref.refcount) != 0) if (atomic_read(&xprt->xpt_ref.refcount) != 0)
pr_err("svcrdma: sc_xprt still in use? (%d)\n", pr_err("svcrdma: sc_xprt still in use? (%d)\n",