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Staging: hv: netvsc: Introduce state to manage the lifecycle of net device

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Introduce state to manage the lifecycle of net device.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan 2011-08-27 11:31:12 -07:00 committed by Greg Kroah-Hartman
parent 509ee3878b
commit c38b9c7118
2 changed files with 7 additions and 0 deletions
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1
drivers/staging/hv/hyperv_net.h
View file

@ -371,6 +371,7 @@ struct netvsc_device {
atomic_t refcnt;
atomic_t num_outstanding_sends;
bool destroy;
/*
* List of free preallocated hv_netvsc_packet to represent receive
* packet

6
drivers/staging/hv/netvsc.c
View file

@ -43,6 +43,7 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device)
/* Set to 2 to allow both inbound and outbound traffic */
atomic_set(&net_device->refcnt, 2);
net_device->destroy = false;
net_device->dev = device;
device->ext = net_device;
@ -396,6 +397,7 @@ int netvsc_device_remove(struct hv_device *device)
{
struct netvsc_device *net_device;
struct hv_netvsc_packet *netvsc_packet, *pos;
unsigned long flags;
/* Stop outbound traffic ie sends and receives completions */
net_device = release_outbound_net_device(device);
@ -404,6 +406,10 @@ int netvsc_device_remove(struct hv_device *device)
return -ENODEV;
}
spin_lock_irqsave(&device->channel->inbound_lock, flags);
net_device->destroy = true;
spin_unlock_irqrestore(&device->channel->inbound_lock, flags);
/* Wait for all send completions */
while (atomic_read(&net_device->num_outstanding_sends)) {
dev_err(&device->device,