netdev - [PATCH] net: avoid initial "Features changed" message

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <864ebe4e8085d1782e90137e146bb95e38e4c718.1298385559.git.mirq-linux@rere.qmqm.pl>
Date:	Tue, 22 Feb 2011 15:42:06 +0100 (CET)
From:	Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:	netdev@...r.kernel.org
Cc:	Ben Hutchings <bhutchings@...arflare.com>,
	David Miller <davem@...emloft.net>
Subject: [PATCH] net: avoid initial "Features changed" message

Avoid "Features changed" message and ndo_set_features call on device
registration caused by automatic enabling of GSO and GRO. Driver should
have already enabled hardware offloads it set in features, so the
ndo_set_features() is not needed at registration time unless features
change because of other dependencies.

Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
 net/core/dev.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 33f4318..039a9a6 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5475,12 +5475,14 @@ int register_netdevice(struct net_device *dev)
 	 * software offloads (GSO and GRO).
 	 */
 	dev->hw_features |= NETIF_F_SOFT_FEATURES;
-	dev->wanted_features = (dev->features & dev->hw_features)
-		| NETIF_F_SOFT_FEATURES;
+	dev->features |= NETIF_F_SOFT_FEATURES;
+	dev->wanted_features = dev->features & dev->hw_features;
 
 	/* Avoid warning from netdev_fix_features() for GSO without SG */
-	if (!(dev->wanted_features & NETIF_F_SG))
+	if (!(dev->wanted_features & NETIF_F_SG)) {
 		dev->wanted_features &= ~NETIF_F_GSO;
+		dev->features &= ~NETIF_F_GSO;
+	}
 
 	/* Enable GRO and NETIF_F_HIGHDMA for vlans by default,
 	 * vlan_dev_init() will do the dev->features check, so these features
-- 
1.7.2.3

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html