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authorNeil Horman <nhorman@tuxdriver.com>2011-07-26 06:05:38 +0000
committerDavid S. Miller <davem@davemloft.net>2011-07-27 22:39:30 -0700
commit550fd08c2cebad61c548def135f67aba284c6162 (patch)
tree8aa7c4d20a9faeb42261b75cfa38d8fd27b574ff /drivers/isdn
parentd8873315065f1f527c7c380402cf59b1e1d0ae36 (diff)
net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared
After the last patch, We are left in a state in which only drivers calling ether_setup have IFF_TX_SKB_SHARING set (we assume that drivers touching real hardware call ether_setup for their net_devices and don't hold any state in their skbs. There are a handful of drivers that violate this assumption of course, and need to be fixed up. This patch identifies those drivers, and marks them as not being able to support the safe transmission of skbs by clearning the IFF_TX_SKB_SHARING flag in priv_flags Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Karsten Keil <isdn@linux-pingi.de> CC: "David S. Miller" <davem@davemloft.net> CC: Jay Vosburgh <fubar@us.ibm.com> CC: Andy Gospodarek <andy@greyhouse.net> CC: Patrick McHardy <kaber@trash.net> CC: Krzysztof Halasa <khc@pm.waw.pl> CC: "John W. Linville" <linville@tuxdriver.com> CC: Greg Kroah-Hartman <gregkh@suse.de> CC: Marcel Holtmann <marcel@holtmann.org> CC: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn')
-rw-r--r--drivers/isdn/i4l/isdn_net.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/isdn/i4l/isdn_net.c b/drivers/isdn/i4l/isdn_net.c
index 48e9cc0369b..1f73d7f7e02 100644
--- a/drivers/isdn/i4l/isdn_net.c
+++ b/drivers/isdn/i4l/isdn_net.c
@@ -2532,6 +2532,9 @@ static void _isdn_setup(struct net_device *dev)
/* Setup the generic properties */
dev->flags = IFF_NOARP|IFF_POINTOPOINT;
+
+ /* isdn prepends a header in the tx path, can't share skbs */
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->header_ops = NULL;
dev->netdev_ops = &isdn_netdev_ops;