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hv_netvsc: Split netvsc_revoke_buf() and netvsc_teardown_gpadl() 

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: 0ef58b0a05 ("hv_netvsc: change GPAD teardown order on older versions")
Signed-off-by: Mohammed Gamal <mgamal@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mohammed Gamal 2018-04-05 21:09:19 +02:00 committed by David S. Miller
parent 2afc5d61a7
commit 7992894c30
1 changed files with 34 additions and 12 deletions
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46
drivers/net/hyperv/netvsc.c
View File

@ -109,11 +109,11 @@ static void free_netvsc_device_rcu(struct netvsc_device *nvdev)
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;
/*
@ -157,6 +157,14 @@ static void netvsc_revoke_buf(struct hv_device *device,
}
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
@ -202,8 +210,8 @@ static void netvsc_revoke_buf(struct hv_device *device,
}
}
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;
@ -222,6 +230,13 @@ static void netvsc_teardown_gpadl(struct hv_device *device,
}
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,
@ -437,8 +452,10 @@ static int netvsc_init_buf(struct hv_device *device,
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;
@ -575,7 +592,8 @@ void netvsc_device_remove(struct hv_device *device)
= 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);
@ -590,14 +608,18 @@ void netvsc_device_remove(struct hv_device *device)
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);