RDMA/cxgb4: Use vmalloc() for debugfs QP dump

This allows dumping thousands of QPs.  Log active open failures of
interest.

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/cxgb4/cm.c

@@ -1413,6 +1413,24 @@ static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
 		return 0;
 	}
 
+	/*
+	 * Log interesting failures.
+	 */
+	switch (status) {
+	case CPL_ERR_CONN_RESET:
+	case CPL_ERR_CONN_TIMEDOUT:
+		break;
+	default:
+		printk(KERN_INFO MOD "Active open failure - "
+		       "atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
+		       atid, status, status2errno(status),
+		       &ep->com.local_addr.sin_addr.s_addr,
+		       ntohs(ep->com.local_addr.sin_port),
+		       &ep->com.remote_addr.sin_addr.s_addr,
+		       ntohs(ep->com.remote_addr.sin_port));
+		break;
+	}
+
 	connect_reply_upcall(ep, status2errno(status));
 	state_set(&ep->com, DEAD);
 

drivers/infiniband/hw/cxgb4/device.c

@@ -121,7 +121,7 @@ static int qp_release(struct inode *inode, struct file *file)
 		printk(KERN_INFO "%s null qpd?\n", __func__);
 		return 0;
 	}
-	kfree(qpd->buf);
+	vfree(qpd->buf);
 	kfree(qpd);
 	return 0;
 }
@@ -145,7 +145,7 @@ static int qp_open(struct inode *inode, struct file *file)
 	spin_unlock_irq(&qpd->devp->lock);
 
 	qpd->bufsize = count * 128;
-	qpd->buf = kmalloc(qpd->bufsize, GFP_KERNEL);
+	qpd->buf = vmalloc(qpd->bufsize);
 	if (!qpd->buf) {
 		ret = -ENOMEM;
 		goto err1;