linux-kernel - [PATCH 30 of 33] IB/ipath

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Date:	Thu, 15 Mar 2007 14:45:14 -0700
From:	Bryan O'Sullivan <bos@...hscale.com>
To:	rdreier@...co.com
Cc:	openib-general@...nfabrics.org, linux-kernel@...r.kernel.org
Subject: [PATCH 30 of 33] IB/ipath - check reserved keys

# HG changeset patch
# User Robert Walsh <robert.walsh@...gic.com>
# Date 1173994465 25200
# Node ID bf280d5f83d59788b58c17ff206bc3f54271a790
# Parent  8c4f730dbde3eed6e066ead5be4746d58840f24f
IB/ipath - check reserved keys

Don't let userspace use the direct-physical-map L-key or R-key.

Signed-off-by: Ralph Campbell <ralph.campbell@...gic.com>

diff -r 8c4f730dbde3 -r bf280d5f83d5 drivers/infiniband/hw/ipath/ipath_keys.c
--- a/drivers/infiniband/hw/ipath/ipath_keys.c	Thu Mar 15 14:34:25 2007 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_keys.c	Thu Mar 15 14:34:25 2007 -0700
@@ -133,6 +133,12 @@ int ipath_lkey_ok(struct ipath_qp *qp, s
 	 * being reversible by calling bus_to_virt().
 	 */
 	if (sge->lkey == 0) {
+		struct ipath_pd *pd = to_ipd(qp->ibqp.pd);
+
+		if (pd->user) {
+			ret = 0;
+			goto bail;
+		}
 		isge->mr = NULL;
 		isge->vaddr = (void *) sge->addr;
 		isge->length = sge->length;
@@ -206,6 +212,12 @@ int ipath_rkey_ok(struct ipath_qp *qp, s
 	 * (see ipath_get_dma_mr and ipath_dma.c).
 	 */
 	if (rkey == 0) {
+		struct ipath_pd *pd = to_ipd(qp->ibqp.pd);
+
+		if (pd->user) {
+			ret = 0;
+			goto bail;
+		}
 		sge->mr = NULL;
 		sge->vaddr = (void *) vaddr;
 		sge->length = len;
-
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