From: Krishna Kumar <krkumar2@in.ibm.com>
Date: Wed, 14 Oct 2009 19:54:53 +0000 (+0000)
Subject: genetlink: Optimize genl_register_family()
X-Git-Tag: firefly_0821_release~9833^2~3968^2~770
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=93860b08e31a3202b6e67e386811545e719a0165;p=firefly-linux-kernel-4.4.55.git

genetlink: Optimize genl_register_family()

genl_register_family() doesn't need to call genl_family_find_byid
when GENL_ID_GENERATE is passed during register.

Patch on net-next-2.6, compile and reboot testing only.

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 44ff3f3810fa..ddfdb7d2e02b 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -374,11 +374,6 @@ int genl_register_family(struct genl_family *family)
 		goto errout_locked;
 	}
 
-	if (genl_family_find_byid(family->id)) {
-		err = -EEXIST;
-		goto errout_locked;
-	}
-
 	if (family->id == GENL_ID_GENERATE) {
 		u16 newid = genl_generate_id();
 
@@ -388,6 +383,9 @@ int genl_register_family(struct genl_family *family)
 		}
 
 		family->id = newid;
+	} else if (genl_family_find_byid(family->id)) {
+		err = -EEXIST;
+		goto errout_locked;
 	}
 
 	if (family->maxattr) {