linux-kernel - [PATCH 8 of 28] IB/ipath

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Message-Id: <cc3350eeb557466198c1.1159459204@eng-12.pathscale.com>
Date:	Thu, 28 Sep 2006 09:00:04 -0700
From:	Bryan O'Sullivan <bos@...hscale.com>
To:	rdreier@...co.com
Cc:	linux-kernel@...r.kernel.org, openib-general@...nib.org
Subject: [PATCH 8 of 28] IB/ipath - count SRQs properly

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@...gic.com>

diff -r fcd3e3bc98d8 -r cc3350eeb557 drivers/infiniband/hw/ipath/ipath_srq.c
--- a/drivers/infiniband/hw/ipath/ipath_srq.c	Thu Sep 28 08:57:12 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_srq.c	Thu Sep 28 08:57:12 2006 -0700
@@ -103,11 +103,6 @@ struct ib_srq *ipath_create_srq(struct i
 	struct ipath_srq *srq;
 	u32 sz;
 	struct ib_srq *ret;
-
-	if (dev->n_srqs_allocated == ib_ipath_max_srqs) {
-		ret = ERR_PTR(-ENOMEM);
-		goto done;
-	}
 
 	if (srq_init_attr->attr.max_wr == 0) {
 		ret = ERR_PTR(-EINVAL);
@@ -180,10 +175,17 @@ struct ib_srq *ipath_create_srq(struct i
 	spin_lock_init(&srq->rq.lock);
 	srq->rq.wq->head = 0;
 	srq->rq.wq->tail = 0;
-	srq->rq.max_sge = srq_init_attr->attr.max_sge;
 	srq->limit = srq_init_attr->attr.srq_limit;
 
-	dev->n_srqs_allocated++;
+	spin_lock(&dev->n_srqs_lock);
+	if (dev->n_srqs_allocated == ib_ipath_max_srqs) {
+		spin_unlock(&dev->n_srqs_lock);
+		ret = ERR_PTR(-ENOMEM);
+		goto bail_wq;
+	}
+
+ 	dev->n_srqs_allocated++;
+	spin_unlock(&dev->n_srqs_lock);
 
 	ret = &srq->ibsrq;
 	goto done;
@@ -351,8 +353,13 @@ int ipath_destroy_srq(struct ib_srq *ibs
 	struct ipath_srq *srq = to_isrq(ibsrq);
 	struct ipath_ibdev *dev = to_idev(ibsrq->device);
 
+	spin_lock(&dev->n_srqs_lock);
 	dev->n_srqs_allocated--;
-	vfree(srq->rq.wq);
+	spin_unlock(&dev->n_srqs_lock);
+	if (srq->ip)
+		kref_put(&srq->ip->ref, ipath_release_mmap_info);
+	else
+		vfree(srq->rq.wq);
 	kfree(srq);
 
 	return 0;
-
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