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Subject[PATCH 094/117] Staging: hv: netvsc: Get rid of release_inbound_net_device() by inlining the code
Date
Get rid of release_inbound_net_device() by inlining the code.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/staging/hv/netvsc.c | 32 ++++----------------------------
1 files changed, 4 insertions(+), 28 deletions(-)
diff --git a/drivers/staging/hv/netvsc.c b/drivers/staging/hv/netvsc.c
index 3975219..6805137 100644
--- a/drivers/staging/hv/netvsc.c
+++ b/drivers/staging/hv/netvsc.c
@@ -98,30 +98,6 @@ static void put_net_device(struct hv_device *device)
spin_unlock_irqrestore(&device->ext_lock, flags);
}

-static struct netvsc_device *release_inbound_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;
- }
-
- spin_unlock_irqrestore(&device->ext_lock, flags);
- /* Busy wait until the ref drop to 1, then set it to 0 */
- while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1)
- udelay(100);
-
- spin_lock_irqsave(&device->ext_lock, flags);
- device->ext = NULL;
- spin_unlock_irqrestore(&device->ext_lock, flags);
- return net_device;
-}
-
static int netvsc_destroy_recv_buf(struct netvsc_device *net_device)
{
struct nvsp_message *revoke_packet;
@@ -423,8 +399,10 @@ int netvsc_device_remove(struct hv_device *device)

netvsc_disconnect_vsp(net_device);

- /* Stop inbound traffic ie receives and sends completions */
- net_device = release_inbound_net_device(device);
+ spin_lock_irqsave(&device->ext_lock, flags);
+ atomic_dec(&net_device->refcnt);
+ device->ext = NULL;
+ spin_unlock_irqrestore(&device->ext_lock, flags);

/*
* Wait until the ref cnt falls to 0.
@@ -990,8 +968,6 @@ cleanup:
kfree(packet);
}

- release_inbound_net_device(device);
-
kfree(net_device);
}

--
1.7.4.1


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