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    Subject[NET-NEXT PATCH 17/18] net: add netif_napi_del function to allow for removal of napistructs
    Date
    From: Alexander Duyck <alexander.h.duyck@intel.com>

    Adds netif_napi_del function which is used to remove the napi struct from
    the netdev napi_list in cases where CONFIG_NETPOLL was enabled.
    The motivation for adding this is to handle the case in which the number of
    queues on a device changes due to a configuration change. Previously the
    napi structs for each queue would be left in the list until the netdev was
    freed.

    Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
    Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
    ---

    include/linux/netdevice.h | 13 +++++++++++++
    1 files changed, 13 insertions(+), 0 deletions(-)

    diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
    index 1304ad2..42fc98e 100644
    --- a/include/linux/netdevice.h
    +++ b/include/linux/netdevice.h
    @@ -826,6 +826,19 @@ static inline void netif_napi_add(struct net_device *dev,
    set_bit(NAPI_STATE_SCHED, &napi->state);
    }

    +/**
    + * netif_napi_del - remove a napi context
    + * @napi: napi context
    + *
    + * netif_napi_del() removes a napi context from the network device napi list
    + */
    +static inline void netif_napi_del(struct napi_struct *napi)
    +{
    +#ifdef CONFIG_NETPOLL
    + list_del(&napi->dev_list);
    +#endif
    +}
    +
    struct packet_type {
    __be16 type; /* This is really htons(ether_type). */
    struct net_device *dev; /* NULL is wildcarded here */


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