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Subject[PATCH 16/40] Staging: hv: netvsc: Introduce state to manage the lifecycle of net device
Date
In preparation for cleaning up reference counts, 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: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
---
drivers/staging/hv/hyperv_net.h | 1 +
drivers/staging/hv/netvsc.c | 2 ++
2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/hv/hyperv_net.h b/drivers/staging/hv/hyperv_net.h
index b5bee9e..c6836be 100644
--- a/drivers/staging/hv/hyperv_net.h
+++ b/drivers/staging/hv/hyperv_net.h
@@ -371,6 +371,7 @@ struct netvsc_device {

atomic_t refcnt;
atomic_t num_outstanding_sends;
+ bool destroy;
bool drain_notify;
wait_queue_head_t waiting_to_drain;
/*
diff --git a/drivers/staging/hv/netvsc.c b/drivers/staging/hv/netvsc.c
index 56749ca..f03018c 100644
--- a/drivers/staging/hv/netvsc.c
+++ b/drivers/staging/hv/netvsc.c
@@ -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->drain_notify = false;
+ net_device->destroy = false;
init_waitqueue_head(&net_device->waiting_to_drain);

net_device->dev = device;
@@ -409,6 +410,7 @@ int netvsc_device_remove(struct hv_device *device)
netdev_err(ndev, "No net device present!!\n");
return -ENODEV;
}
+ net_device->destroy = true;

/* Wait for all send completions */
while (atomic_read(&net_device->num_outstanding_sends)) {
--
1.7.4.1


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