diff options
Diffstat (limited to 'drivers/net/hyperv/rndis_filter.c')
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 2e40417a8087..9b8263db49cc 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -984,9 +984,16 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc) struct netvsc_device *nvscdev; u16 chn_index = new_sc->offermsg.offer.sub_channel_index; int ret; + unsigned long flags; nvscdev = hv_get_drvdata(new_sc->primary_channel->device_obj); + spin_lock_irqsave(&nvscdev->sc_lock, flags); + nvscdev->num_sc_offered--; + spin_unlock_irqrestore(&nvscdev->sc_lock, flags); + if (nvscdev->num_sc_offered == 0) + complete(&nvscdev->channel_init_wait); + if (chn_index >= nvscdev->num_chn) return; @@ -1015,8 +1022,10 @@ int rndis_filter_device_add(struct hv_device *dev, u32 rsscap_size = sizeof(struct ndis_recv_scale_cap); u32 mtu, size; u32 num_rss_qs; + u32 sc_delta; const struct cpumask *node_cpu_mask; u32 num_possible_rss_qs; + unsigned long flags; rndis_device = get_rndis_device(); if (!rndis_device) @@ -1039,6 +1048,8 @@ int rndis_filter_device_add(struct hv_device *dev, net_device->max_chn = 1; net_device->num_chn = 1; + spin_lock_init(&net_device->sc_lock); + net_device->extension = rndis_device; rndis_device->net_dev = net_device; @@ -1116,6 +1127,9 @@ int rndis_filter_device_add(struct hv_device *dev, num_possible_rss_qs = cpumask_weight(node_cpu_mask); net_device->num_chn = min(num_possible_rss_qs, num_rss_qs); + num_rss_qs = net_device->num_chn - 1; + net_device->num_sc_offered = num_rss_qs; + if (net_device->num_chn == 1) goto out; @@ -1157,11 +1171,25 @@ int rndis_filter_device_add(struct hv_device *dev, ret = rndis_filter_set_rss_param(rndis_device, net_device->num_chn); + /* + * Wait for the host to send us the sub-channel offers. + */ + spin_lock_irqsave(&net_device->sc_lock, flags); + sc_delta = num_rss_qs - (net_device->num_chn - 1); + net_device->num_sc_offered -= sc_delta; + spin_unlock_irqrestore(&net_device->sc_lock, flags); + + while (net_device->num_sc_offered != 0) { + t = wait_for_completion_timeout(&net_device->channel_init_wait, 10*HZ); + if (t == 0) + WARN(1, "Netvsc: Waiting for sub-channel processing"); + } out: if (ret) { net_device->max_chn = 1; net_device->num_chn = 1; } + return 0; /* return 0 because primary channel can be used alone */ err_dev_remv: |