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hv_netvsc: avoid repeated updates of packet filter

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The netvsc driver can get repeated calls to netvsc_rx_mode during
network setup; each of these calls ends up scheduling the lower
layers to update tha packet filter. This update requires an
request/response to the host. So avoid doing this if we already
know that the correct packet filter value is set.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2018-03-07 13:49:10 -08:00 committed by David S. Miller
parent de3d50aadd
commit 7eeb4a6ee4
2 changed files with 7 additions and 2 deletions
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1
drivers/net/hyperv/hyperv_net.h
View File

@ -173,6 +173,7 @@ struct rndis_device {
struct list_head req_list;
struct work_struct mcast_work;
u32 filter;
bool link_state; /* 0 - link up, 1 - link down */

8
drivers/net/hyperv/rndis_filter.c
View File

@ -825,13 +825,15 @@ static int rndis_filter_set_packet_filter(struct rndis_device *dev,
struct rndis_set_request *set;
int ret;
if (dev->filter == new_filter)
return 0;
request = get_rndis_request(dev, RNDIS_MSG_SET,
RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
sizeof(u32));
if (!request)
return -ENOMEM;
/* Setup the rndis set */
set = &request->request_msg.msg.set_req;
set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
@ -842,8 +844,10 @@ static int rndis_filter_set_packet_filter(struct rndis_device *dev,
&new_filter, sizeof(u32));
ret = rndis_filter_send_request(dev, request);
if (ret == 0)
if (ret == 0) {
wait_for_completion(&request->wait_event);
dev->filter = new_filter;
}
put_rndis_request(dev, request);