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netvsc: fix netvsc_set_channels 

The number of channels returned by rndis_filter_device_add maybe
less than the number requested. Therefore set correct real
number of queues.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2017-07-24 10:57:28 -07:00 committed by David S. Miller
parent 43bf99ce00
commit 7ca4593338
1 changed files with 19 additions and 33 deletions
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52
drivers/net/hyperv/netvsc_drv.c
View File

@ -713,39 +713,16 @@ static void netvsc_get_channels(struct net_device *net,
}
}
static int netvsc_set_queues(struct net_device *net, struct hv_device *dev,
u32 num_chn)
{
struct netvsc_device_info device_info;
struct netvsc_device *net_device;
int ret;
memset(&device_info, 0, sizeof(device_info));
device_info.num_chn = num_chn;
device_info.ring_size = ring_size;
device_info.max_num_vrss_chns = num_chn;
ret = netif_set_real_num_tx_queues(net, num_chn);
if (ret)
return ret;
ret = netif_set_real_num_rx_queues(net, num_chn);
if (ret)
return ret;
net_device = rndis_filter_device_add(dev, &device_info);
return PTR_ERR_OR_ZERO(net_device);
}
static int netvsc_set_channels(struct net_device *net,
struct ethtool_channels *channels)
{
struct net_device_context *net_device_ctx = netdev_priv(net);
struct hv_device *dev = net_device_ctx->device_ctx;
struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev);
unsigned int count = channels->combined_count;
unsigned int orig, count = channels->combined_count;
struct netvsc_device_info device_info;
bool was_opened;
int ret;
int ret = 0;
/* We do not support separate count for rx, tx, or other */
if (count == 0 ||
@ -764,19 +741,29 @@ static int netvsc_set_channels(struct net_device *net,
if (count > nvdev->max_chn)
return -EINVAL;
orig = nvdev->num_chn;
was_opened = rndis_filter_opened(nvdev);
if (was_opened)
rndis_filter_close(nvdev);
rndis_filter_device_remove(dev, nvdev);
ret = netvsc_set_queues(net, dev, count);
if (ret == 0)
nvdev->num_chn = count;
else
netvsc_set_queues(net, dev, nvdev->num_chn);
memset(&device_info, 0, sizeof(device_info));
device_info.num_chn = count;
device_info.ring_size = ring_size;
device_info.max_num_vrss_chns = count;
nvdev = rndis_filter_device_add(dev, &device_info);
if (!IS_ERR(nvdev)) {
netif_set_real_num_tx_queues(net, nvdev->num_chn);
netif_set_real_num_rx_queues(net, nvdev->num_chn);
ret = PTR_ERR(nvdev);
} else {
device_info.num_chn = orig;
device_info.max_num_vrss_chns = count;
rndis_filter_device_add(dev, &device_info);
}
nvdev = rtnl_dereference(net_device_ctx->nvdev);
if (was_opened)
rndis_filter_open(nvdev);
@ -863,7 +850,6 @@ static int netvsc_change_mtu(struct net_device *ndev, int mtu)
memset(&device_info, 0, sizeof(device_info));
device_info.ring_size = ring_size;
device_info.num_chn = nvdev->num_chn;
device_info.max_num_vrss_chns = nvdev->num_chn;
rndis_filter_device_remove(hdev, nvdev);