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| author | Stephen Hemminger <sthemmin@microsoft.com> | 2016-09-22 16:56:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-23 08:39:48 -0400 |
| commit | 07d0f0008c783d2a2fce8497000938db15fd7aa1 (patch) | |
| tree | b792016c8e949a41850a188a6eadebb9250f74eb /drivers/net/hyperv | |
| parent | 17db4bcef3c3c45b95b3b3d8577f725df1b2c0a0 (diff) | |
| download | linux-stable-07d0f0008c783d2a2fce8497000938db15fd7aa1.tar.gz linux-stable-07d0f0008c783d2a2fce8497000938db15fd7aa1.tar.bz2 linux-stable-07d0f0008c783d2a2fce8497000938db15fd7aa1.zip | |
hv_netvsc: dev hold/put reference to VF
The netvsc driver holds a pointer to the virtual function network device if
managing SR-IOV association. In order to ensure that the VF network device
does not disappear, it should be using dev_hold/dev_put to get a reference
count.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 2360e704e271..e74dbcc2916d 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1262,6 +1262,8 @@ static int netvsc_register_vf(struct net_device *vf_netdev) * Take a reference on the module. */ try_module_get(THIS_MODULE); + + dev_hold(vf_netdev); net_device_ctx->vf_netdev = vf_netdev; return NOTIFY_OK; } @@ -1376,6 +1378,7 @@ static int netvsc_unregister_vf(struct net_device *vf_netdev) netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); netvsc_inject_disable(net_device_ctx); net_device_ctx->vf_netdev = NULL; + dev_put(vf_netdev); module_put(THIS_MODULE); return NOTIFY_OK; } |