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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-01-14 21:05:05 -0800
committerDavid S. Miller <davem@davemloft.net>2009-01-14 21:05:05 -0800
commit937f1ba56b4be37d9e2ad77412f95048662058d2 (patch)
tree154e0c5ce11b5afe25816d667c76b19ac679d530 /include
parent2950e952920811be465ec95c6b56f03dc66a05c0 (diff)
downloadop-kernel-dev-937f1ba56b4be37d9e2ad77412f95048662058d2.zip
op-kernel-dev-937f1ba56b4be37d9e2ad77412f95048662058d2.tar.gz
net: Add init_dummy_netdev() and fix EMAC driver using it
This adds an init_dummy_netdev() function that gets a network device structure (allocation and lifetime entirely under caller's control) and initialize the minimum amount of fields so it can be used to schedule NAPI polls without registering a full blown interface. This is to be used by drivers that need to tie several hardware interfaces to a single NAPI poll scheduler due to HW limitations. It also updates the ibm_newemac driver to use that, this fixing the oops on 2.6.29 due to passing NULL as "dev" to netif_napi_add() Symbol is exported GPL only a I don't think we want binary drivers doing that sort of acrobatics (if we want them at all). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/netdevice.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 4647604..ec54785 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -795,6 +795,7 @@ struct net_device
NETREG_UNREGISTERING, /* called unregister_netdevice */
NETREG_UNREGISTERED, /* completed unregister todo */
NETREG_RELEASED, /* called free_netdev */
+ NETREG_DUMMY, /* dummy device for NAPI poll */
} reg_state;
/* Called from unregister, can be used to call free_netdev */
@@ -1077,6 +1078,8 @@ extern void free_netdev(struct net_device *dev);
extern void synchronize_net(void);
extern int register_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);
+extern int init_dummy_netdev(struct net_device *dev);
+
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
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