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net: Init NAPI dev_list on napi_del 

The recent GRO patches introduced the NAPI removal of devices in
free_netdev.  For drivers that can change the number of queues during
driver operation, the NAPI infrastructure doesn't allow the freeing and
re-addition of NAPI entities without reloading the driver.

This change reinitializes the dev_list in each NAPI struct on delete,
instead of just deleting it (and assigning the list pointers to POISON).
Drivers that wish to remove/re-add NAPI will need to re-initialize the
netdev napi_list after removing all NAPI instances, before re-adding NAPI
devices again.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Peter P Waskiewicz Jr 2008-12-26 01:35:35 -08:00 committed by David S. Miller
parent 26bc19ecf6
commit d7b06636be
1 changed files with 1 additions and 1 deletions
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2
net/core/dev.c
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@ -2548,7 +2548,7 @@ void netif_napi_del(struct napi_struct *napi)
{
struct sk_buff *skb, *next;
list_del(&napi->dev_list);
list_del_init(&napi->dev_list);
for (skb = napi->gro_list; skb; skb = next) {
next = skb->next;