IPoIB/cm: Factor out ipoib_cm_create_srq()

Factor out the code to create an SRQ and allocate the receive ring in
ipoib_cm_dev_init() into a new function ipoib_cm_create_srq().  This
will make the code neater when support for devices that don't implement
SRQs is added.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 388f041..9edc9fc 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1271,7 +1271,7 @@ int ipoib_cm_add_mode_attr(struct net_device *dev)
        return device_create_file(&dev->dev, &dev_attr_mode);
 }
 
-int ipoib_cm_dev_init(struct net_device *dev)
+static int ipoib_cm_create_srq(struct net_device *dev)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct ib_srq_init_attr srq_init_attr = {
@@ -1280,6 +1280,31 @@ int ipoib_cm_dev_init(struct net_device *dev)
                        .max_sge = IPOIB_CM_RX_SG
                }
        };
+       int ret;
+
+       priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr);
+       if (IS_ERR(priv->cm.srq)) {
+               ret = PTR_ERR(priv->cm.srq);
+               priv->cm.srq = NULL;
+               return ret;
+       }
+
+       priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring,
+                                   GFP_KERNEL);
+       if (!priv->cm.srq_ring) {
+               printk(KERN_WARNING "%s: failed to allocate CM ring (%d entries)\n",
+                      priv->ca->name, ipoib_recvq_size);
+               ib_destroy_srq(priv->cm.srq);
+               priv->cm.srq = NULL;
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+int ipoib_cm_dev_init(struct net_device *dev)
+{
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
        int ret, i;
 
        INIT_LIST_HEAD(&priv->cm.passive_ids);
@@ -1297,22 +1322,6 @@ int ipoib_cm_dev_init(struct net_device *dev)
 
        skb_queue_head_init(&priv->cm.skb_queue);
 
-       priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr);
-       if (IS_ERR(priv->cm.srq)) {
-               ret = PTR_ERR(priv->cm.srq);
-               priv->cm.srq = NULL;
-               return ret;
-       }
-
-       priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring,
-                                   GFP_KERNEL);
-       if (!priv->cm.srq_ring) {
-               printk(KERN_WARNING "%s: failed to allocate CM ring (%d entries)\n",
-                      priv->ca->name, ipoib_recvq_size);
-               ipoib_cm_dev_cleanup(dev);
-               return -ENOMEM;
-       }
-
        for (i = 0; i < IPOIB_CM_RX_SG; ++i)
                priv->cm.rx_sge[i].lkey = priv->mr->lkey;
 
@@ -1323,6 +1332,10 @@ int ipoib_cm_dev_init(struct net_device *dev)
        priv->cm.rx_wr.sg_list = priv->cm.rx_sge;
        priv->cm.rx_wr.num_sge = IPOIB_CM_RX_SG;
 
+       ret = ipoib_cm_create_srq(dev);
+       if (ret)
+               return ret;
+
        for (i = 0; i < ipoib_recvq_size; ++i) {
                if (!ipoib_cm_alloc_rx_skb(dev, i, IPOIB_CM_RX_SG - 1,
                                           priv->cm.srq_ring[i].mapping)) {