linux/drivers/net
Greg Edwards 46b3bb9b47 igb: do not drop PF mailbox lock after read of VF message
When the PF receives a mailbox message from the VF, it grabs the mailbox
lock, reads the VF message from the mailbox, ACKs the message and drops
the lock.

While the PF is performing the action for the VF message, nothing
prevents another VF message from being posted to the mailbox.  The
current code handles this condition by just dropping any new VF messages
without processing them.  This results in a mailbox timeout in the VM
for posted messages waiting for an ACK, and the VF is reset by the
igbvf_watchdog_task in the VM.

Given the right sequence of VF messages and mailbox timeouts, this
condition can go on ad infinitum.

Modify the PF mailbox read method to take an 'unlock' argument that
optionally leaves the mailbox locked by the PF after reading the VF
message.  This ensures another VF message is not posted to the mailbox
until after the PF has completed processing the VF message and written
its reply.

Signed-off-by: Greg Edwards <gedwards@ddn.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-08-08 17:52:45 -07:00
..
appletalk drivers/net: Fix ptr_ret.cocci warnings. 2017-07-25 12:27:06 -07:00
arcnet arcnet: com20020-pci: constify attribute_group structures. 2017-07-18 12:04:56 -07:00
bonding Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-01 10:07:50 -07:00
caif Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
can net: can: janz-ican3: constify attribute_group structures. 2017-07-18 12:04:56 -07:00
cris
dsa net: dsa: Move FDB dump implementation inside DSA 2017-08-07 14:48:48 -07:00
ethernet igb: do not drop PF mailbox lock after read of VF message 2017-08-08 17:52:45 -07:00
fddi
fjes networking: introduce and use skb_put_data() 2017-06-16 11:48:37 -04:00
hamradio hamradio: baycom: make hdlcdrv_ops const 2017-08-07 14:26:46 -07:00
hippi networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
hyperv netvsc: fix rtnl deadlock on unregister of vf 2017-08-06 21:28:10 -07:00
ieee802154 mrf24j40: Fix en error handling path in 'mrf24j40_probe()' 2017-07-25 13:17:31 +02:00
ipvlan ipvlan: Stop advertising NETIF_F_UFO support. 2017-07-17 09:52:57 -07:00
irda mcs7780: Fix initialization when CONFIG_VMAP_STACK is enabled 2017-07-24 16:24:05 -07:00
phy sfp: add SFP module support 2017-08-06 20:55:29 -07:00
plip
ppp ppp: Fix a scheduling-while-atomic bug in del_chan 2017-07-31 21:59:01 -07:00
slip networking: introduce and use skb_put_data() 2017-06-16 11:48:37 -04:00
team team: use a larger struct for mac address 2017-07-29 11:25:05 -07:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-07-21 03:38:43 +01:00
vmxnet3 vmxnet3: avoid format strint overflow warning 2017-07-14 09:03:11 -07:00
wan networking: make skb_pull & friends return void pointers 2017-06-16 11:48:39 -04:00
wimax networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
wireless wireless-drivers-next patches for 4.14 2017-08-07 11:37:47 -07:00
xen-netback xen-netback: correctly schedule rate-limited queues 2017-06-22 11:15:42 -04:00
dummy.c dummy: Remove references to NETIF_F_UFO. 2017-07-17 09:52:57 -07:00
eql.c
geneve.c geneve/vxlan: offload ports on register/unregister events 2017-07-24 13:52:59 -07:00
gtp.c net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
ifb.c net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
Kconfig
LICENSE.SRC
loopback.c
macsec.c net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
macvlan.c macvlan/macvtap: Remove NETIF_F_UFO advertisement. 2017-07-17 09:52:57 -07:00
macvtap.c macvlan/macvtap: Remove NETIF_F_UFO advertisement. 2017-07-17 09:52:57 -07:00
Makefile
mdio.c
mii.c
netconsole.c netconsole: Remove duplicate "netconsole: " logging prefix 2017-06-13 12:57:40 -04:00
nlmon.c net: add netlink_ext_ack argument to rtnl_link_ops.validate 2017-06-26 23:13:22 -04:00
ntb_netdev.c ntb_netdev: set the net_device's parent 2017-07-06 11:30:08 -04:00
rionet.c net: convert sk_buff.users from atomic_t to refcount_t 2017-07-01 07:39:07 -07:00
sb1000.c
Space.c
sungem_phy.c
tap.c tun/tap: Remove references to NETIF_F_UFO. 2017-07-17 09:52:57 -07:00
tun.c sock: enable MSG_ZEROCOPY 2017-08-03 21:37:30 -07:00
veth.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-06-30 12:43:08 -04:00
virtio_net.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-01 10:07:50 -07:00
vrf.c net: vrf: Add extack messages for newlink failures 2017-08-07 15:16:33 -07:00
vsockmon.c
vxlan.c geneve/vxlan: offload ports on register/unregister events 2017-07-24 13:52:59 -07:00
xen-netfront.c