svcrdma: Update max_send_sges after QP is created

chucklever · chucklever · commit 4c8c0fa0d32a · 2024-03-01T09:12:26.000-05:00
rdma_create_qp() can modify cap.max_send_sges. Copy the new value
to the svcrdma transport so it is bound by the new limit instead
of the requested one.

Signed-off-by: Chuck Lever &lt;chuck.lever@oracle.com&gt;
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -467,6 +467,7 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt)
 		trace_svcrdma_qp_err(newxprt, ret);
 		goto errout;
 	}
+	newxprt->sc_max_send_sges = qp_attr.cap.max_send_sge;
 	newxprt->sc_qp = newxprt->sc_cm_id->qp;
 
 	if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))

Original file line number	Diff line number	Diff line change
`@@ -467,6 +467,7 @@ static struct svc_xprt svc_rdma_accept(struct svc_xprt xprt)`
`467`	`467`	`trace_svcrdma_qp_err(newxprt, ret);`
`468`	`468`	`goto errout;`
`469`	`469`	`}`
	`470`	`+ newxprt->sc_max_send_sges = qp_attr.cap.max_send_sge;`
`470`	`471`	`newxprt->sc_qp = newxprt->sc_cm_id->qp;`
`471`	`472`
`472`	`473`	`if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))`