4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mohammed Gamal <mgamal@xxxxxxxxxx>
[ Commit 7992894c305eaf504d005529637ff8283d0a849d upstream. ]
Split each of the functions into two for each of send/recv buffers.
This will be needed in order to implement a fine-grained messaging
sequence to the host so that we accommodate the requirements of
different Windows versions
Fixes: 0ef58b0a05c12 ("hv_netvsc: change GPAD teardown order on older versions")
Signed-off-by: Mohammed Gamal <mgamal@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/hyperv/netvsc.c | 46 ++++++++++++++++++++++++++++++++------------
1 file changed, 34 insertions(+), 12 deletions(-)
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -105,11 +105,11 @@ static void free_netvsc_device_rcu(struc
call_rcu(&nvdev->rcu, free_netvsc_device);
}
-static void netvsc_revoke_buf(struct hv_device *device,
- struct netvsc_device *net_device)
+static void netvsc_revoke_recv_buf(struct hv_device *device,
+ struct netvsc_device *net_device)
{
- struct nvsp_message *revoke_packet;
struct net_device *ndev = hv_get_drvdata(device);
+ struct nvsp_message *revoke_packet;
int ret;
/*
@@ -151,6 +151,14 @@ static void netvsc_revoke_buf(struct hv_
}
net_device->recv_section_cnt = 0;
}
+}
+
+static void netvsc_revoke_send_buf(struct hv_device *device,
+ struct netvsc_device *net_device)
+{
+ struct net_device *ndev = hv_get_drvdata(device);
+ struct nvsp_message *revoke_packet;
+ int ret;
/* Deal with the send buffer we may have setup.
* If we got a send section size, it means we received a
@@ -194,8 +202,8 @@ static void netvsc_revoke_buf(struct hv_
}
}
-static void netvsc_teardown_gpadl(struct hv_device *device,
- struct netvsc_device *net_device)
+static void netvsc_teardown_recv_gpadl(struct hv_device *device,
+ struct netvsc_device *net_device)
{
struct net_device *ndev = hv_get_drvdata(device);
int ret;
@@ -214,6 +222,13 @@ static void netvsc_teardown_gpadl(struct
}
net_device->recv_buf_gpadl_handle = 0;
}
+}
+
+static void netvsc_teardown_send_gpadl(struct hv_device *device,
+ struct netvsc_device *net_device)
+{
+ struct net_device *ndev = hv_get_drvdata(device);
+ int ret;
if (net_device->send_buf_gpadl_handle) {
ret = vmbus_teardown_gpadl(device->channel,
@@ -423,8 +438,10 @@ static int netvsc_init_buf(struct hv_dev
goto exit;
cleanup:
- netvsc_revoke_buf(device, net_device);
- netvsc_teardown_gpadl(device, net_device);
+ netvsc_revoke_recv_buf(device, net_device);
+ netvsc_revoke_send_buf(device, net_device);
+ netvsc_teardown_recv_gpadl(device, net_device);
+ netvsc_teardown_send_gpadl(device, net_device);
exit:
return ret;
@@ -554,7 +571,8 @@ void netvsc_device_remove(struct hv_devi
= rtnl_dereference(net_device_ctx->nvdev);
int i;
- netvsc_revoke_buf(device, net_device);
+ netvsc_revoke_recv_buf(device, net_device);
+ netvsc_revoke_send_buf(device, net_device);
RCU_INIT_POINTER(net_device_ctx->nvdev, NULL);
@@ -569,14 +587,18 @@ void netvsc_device_remove(struct hv_devi
netdev_dbg(ndev, "net device safe to remove\n");
/* older versions require that buffer be revoked before close */
- if (vmbus_proto_version < VERSION_WIN10)
- netvsc_teardown_gpadl(device, net_device);
+ if (vmbus_proto_version < VERSION_WIN10) {
+ netvsc_teardown_recv_gpadl(device, net_device);
+ netvsc_teardown_send_gpadl(device, net_device);
+ }
/* Now, we can close the channel safely */
vmbus_close(device->channel);
- if (vmbus_proto_version >= VERSION_WIN10)
- netvsc_teardown_gpadl(device, net_device);
+ if (vmbus_proto_version >= VERSION_WIN10) {
+ netvsc_teardown_recv_gpadl(device, net_device);
+ netvsc_teardown_send_gpadl(device, net_device);
+ }
/* Release all resources */
free_netvsc_device_rcu(net_device);
