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>

2 files changed, 20 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 6ce401abdbd0..55ab284e22f2 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/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);
 
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index bdb398f54a64..854562915413 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/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;