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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 /drivers
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 'drivers')
-rw-r--r--drivers/net/ibm_newemac/mal.c4
-rw-r--r--drivers/net/ibm_newemac/mal.h2
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ibm_newemac/mal.c b/drivers/net/ibm_newemac/mal.c
index ecf9798..2a2fc17 100644
--- a/drivers/net/ibm_newemac/mal.c
+++ b/drivers/net/ibm_newemac/mal.c
@@ -613,7 +613,9 @@ static int __devinit mal_probe(struct of_device *ofdev,
INIT_LIST_HEAD(&mal->list);
spin_lock_init(&mal->lock);
- netif_napi_add(NULL, &mal->napi, mal_poll,
+ init_dummy_netdev(&mal->dummy_dev);
+
+ netif_napi_add(&mal->dummy_dev, &mal->napi, mal_poll,
CONFIG_IBM_NEW_EMAC_POLL_WEIGHT);
/* Load power-on reset defaults */
diff --git a/drivers/net/ibm_newemac/mal.h b/drivers/net/ibm_newemac/mal.h
index 2f0a873..9ededfb 100644
--- a/drivers/net/ibm_newemac/mal.h
+++ b/drivers/net/ibm_newemac/mal.h
@@ -214,6 +214,8 @@ struct mal_instance {
int index;
spinlock_t lock;
+ struct net_device dummy_dev;
+
unsigned int features;
};
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