[PATCH 3/6] hv_netvsc: Remove GPADL teardown special case for old Hyper-V hosts

[Michael Kelley]

From: Michael Kelley <mhklinux@xxxxxxxxxxx>

With the overall removal of Linux support for running on Hyper-V
hosts earlier than WS2016 and Windows 10, the special case handling of
GPADL teardown is no longer necessary. Remove it.

Signed-off-by: Michael Kelley <mhklinux@xxxxxxxxxxx>
---
 drivers/net/hyperv/netvsc.c | 20 +++-----------------
 1 file changed, 3 insertions(+), 17 deletions(-)

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 4d319c50955e..4295b96b4312 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -695,17 +695,8 @@ void netvsc_device_remove(struct hv_device *device)
 		= rtnl_dereference(net_device_ctx->nvdev);
 	int i;
 
-	/*
-	 * Revoke receive buffer. If host is pre-Win2016 then tear down
-	 * receive buffer GPADL. Do the same for send buffer.
-	 */
 	netvsc_revoke_recv_buf(device, net_device, ndev);
-	if (vmbus_proto_version < VERSION_WIN10)
-		netvsc_teardown_recv_gpadl(device, net_device, ndev);
-
 	netvsc_revoke_send_buf(device, net_device, ndev);
-	if (vmbus_proto_version < VERSION_WIN10)
-		netvsc_teardown_send_gpadl(device, net_device, ndev);
 
 	RCU_INIT_POINTER(net_device_ctx->nvdev, NULL);
 
@@ -733,14 +724,9 @@ void netvsc_device_remove(struct hv_device *device)
 	/* Now, we can close the channel safely */
 	vmbus_close(device->channel);
 
-	/*
-	 * If host is Win2016 or higher then we do the GPADL tear down
-	 * here after VMBus is closed.
-	*/
-	if (vmbus_proto_version >= VERSION_WIN10) {
-		netvsc_teardown_recv_gpadl(device, net_device, ndev);
-		netvsc_teardown_send_gpadl(device, net_device, ndev);
-	}
+	/* Must do the GPADL teardown after channel is closed */
+	netvsc_teardown_recv_gpadl(device, net_device, ndev);
+	netvsc_teardown_send_gpadl(device, net_device, ndev);
 
 	/* Release all resources */
 	free_netvsc_device_rcu(net_device);
-- 
2.25.1