linux-kernel - Re: [PATCH 1/1] IB/ehca: Disallow creating UC QP with SRQ

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Date:	Fri, 10 Oct 2008 14:41:39 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Hoang-Nam Nguyen <hnguyen@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	general@...ts.openfabrics.org, micfaath@...ibm.com,
	raisch@...ibm.com, stefan.roscher@...ibm.com
Subject: Re: [PATCH 1/1] IB/ehca: Disallow creating UC QP with SRQ

thanks, applied -- it didn't apply to the latest tree, because of the
flush CQE changes, so I merged it manually as below -- let me know if
this is wrong:

commit 0540bbbe455e123a1692d26205ad1a29983883b0
Author: Hoang-Nam Nguyen <hnguyen@...ux.vnet.ibm.com>
Date:   Fri Oct 10 14:40:39 2008 -0700

    IB/ehca: Don't allow creating UC QP with SRQ
    
    This patch prevents a UC QP to be created attached to an SRQ, since
    current firmware does not support this feature.
    
    Signed-off-by: Michael Faath <micfaath@...ibm.com>
    Signed-off-by: Roland Dreier <rolandd@...co.com>

diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 4dbe287..40b578d 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -502,6 +502,12 @@ static struct ehca_qp *internal_create_qp(
 	if (init_attr->srq) {
 		my_srq = container_of(init_attr->srq, struct ehca_qp, ib_srq);
 
+		if (qp_type == IB_QPT_UC) {
+			ehca_err(pd->device, "UC with SRQ not supported");
+			atomic_dec(&shca->num_qps);
+			return ERR_PTR(-EINVAL);
+		}
+
 		has_srq = 1;
 		parms.ext_type = EQPT_SRQBASE;
 		parms.srq_qpn = my_srq->real_qp_num;
--
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