[PATCH 3/6] hv_netvsc: Remove GPADL teardown special case for old Hyper-V hosts
From: Michael Kelley <hidden>
Date: 2026-07-30 18:52:20
Also in:
linux-hyperv, linux-scsi, lkml, virtualization
Subsystem:
hyper-v/azure core and drivers, networking drivers, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Michael Kelley <redacted> 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 <redacted> --- 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);
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2.25.1