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Subject[PATCH 19/40] Staging: hv: netvsc: Get rid of release_outbound_net_device() by inlining the code
Date
Get rid of release_outbound_net_device() by inlining the code.

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/netvsc.c | 35 +++++++----------------------------
1 files changed, 7 insertions(+), 28 deletions(-)

diff --git a/drivers/staging/hv/netvsc.c b/drivers/staging/hv/netvsc.c
index 3ac0e17..7761370 100644
--- a/drivers/staging/hv/netvsc.c
+++ b/drivers/staging/hv/netvsc.c
@@ -100,27 +100,6 @@ static void put_net_device(struct hv_device *device)
spin_unlock_irqrestore(&device->ext_lock, flags);
}

-static struct netvsc_device *release_outbound_net_device(
- struct hv_device *device)
-{
- struct netvsc_device *net_device;
- unsigned long flags;
-
- spin_lock_irqsave(&device->ext_lock, flags);
- net_device = device->ext;
- if (net_device == NULL) {
- spin_unlock_irqrestore(&device->ext_lock, flags);
- return NULL;
- }
-
- /* Busy wait until the ref drop to 2, then set it to 1 */
- while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2)
- udelay(100);
-
- spin_unlock_irqrestore(&device->ext_lock, flags);
- return net_device;
-}
-
static struct netvsc_device *release_inbound_net_device(
struct hv_device *device)
{
@@ -423,14 +402,15 @@ int netvsc_device_remove(struct hv_device *device)
{
struct netvsc_device *net_device;
struct hv_netvsc_packet *netvsc_packet, *pos;
- struct net_device *ndev = dev_get_drvdata(&device->device);

/* Stop outbound traffic ie sends and receives completions */
- net_device = release_outbound_net_device(device);
- if (!net_device) {
- netdev_err(ndev, "No net device present!!\n");
- return -ENODEV;
- }
+
+ /*
+ * Since we currently hold a reference on the net_device,
+ * it is safe to dereference the ext pointer.
+ */
+ net_device = (struct netvsc_device *)device->ext;
+ atomic_dec(&net_device->refcnt);
net_device->destroy = true;

/* Wait for all send completions */
@@ -1006,7 +986,6 @@ cleanup:
kfree(packet);
}

- release_outbound_net_device(device);
release_inbound_net_device(device);

kfree(net_device);
--
1.7.4.1


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