From: Mustafa Ismail <mustafa.ismail@intel.com>
Date: Thu, 28 Jul 2016 20:02:26 +0000 (-0500)
Subject: IB/core: Add flow control to the portmapper netlink calls
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cea05eadded0d4eb59f7be6e1f1560eb6bfde2bf;p=linux-beck.git

IB/core: Add flow control to the portmapper netlink calls

During connection establishment with a large number of
connections, it is possible that the connection requests
might fail. Adding flow control prevents this failure.
Change ibnl_unicast to use blocking to enable flow control.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
---

diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index 9b8c20c8209b..10469b0088b5 100644
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c
@@ -229,7 +229,10 @@ static void ibnl_rcv(struct sk_buff *skb)
 int ibnl_unicast(struct sk_buff *skb, struct nlmsghdr *nlh,
 			__u32 pid)
 {
-	return nlmsg_unicast(nls, skb, pid);
+	int err;
+
+	err = netlink_unicast(nls, skb, pid, 0);
+	return (err < 0) ? err : 0;
 }
 EXPORT_SYMBOL(ibnl_unicast);
 
@@ -252,6 +255,7 @@ int __init ibnl_init(void)
 		return -ENOMEM;
 	}
 
+	nls->sk_sndtimeo = 10 * HZ;
 	return 0;
 }