[patch v2, kernel 3.2.1] RTNETLINK adjusting values ofmin_ifinfo_dump_size

[Stefan Gula]

From: Stefan Gula <steweg@xxxxxxxxx>

Setting link parameters on a netdevice changes the value
of if_nlmsg_size(), therefore it is necessary to recalculate
min_ifinfo_dump_size.

Signed-off-by: Stefan Gula <steweg@xxxxxxxxx>

---
V2-changelog: adjusted commit message

--- linux-3.2.1-orig/net/core/rtnetlink.c	2012-01-12 20:42:45.000000000 +0100
+++ linux/net/core/rtnetlink.c	2012-01-24 14:26:58.083219352 +0100
@@ -1506,6 +1506,9 @@ errout:
 
 	if (send_addr_notify)
 		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
+	min_ifinfo_dump_size = max_t(u16, if_nlmsg_size(dev),
+					min_ifinfo_dump_size);
+
 	return err;
 }
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