linux_dsm_epyc7002/drivers/net
Sathya Perla d0b9cec3e2 be2net: fix unconditionally returning IRQ_HANDLED in INTx
commit e49cc34f introduced an unconditional IRQ_HANDLED return in be_intx()
to workaround Lancer and BE2 HW issues. This is bad as it prevents the kernel
from detecting interrupt storms due to broken HW.

The BE2/Lancer HW issues are:
1) In Lancer, there is no means for the driver to detect if the interrupt
belonged to device, other than counting and notifying events.
2) In Lancer de-asserting INTx takes a while, causing the INTx irq handler
to be called multiple times till the de-assert happens.
3) In BE2, we see an occasional interrupt even when EQs are unarmed.

Issue (1) can cause the notified events to be orphaned, if NAPI was already
running.
This patch fixes this issue by scheduling NAPI only if it is not scheduled
already. Doing this also takes care of possible events_get() race that may be
caused due to issue (2) and (3). Also, IRQ_HANDLED is returned only the first
time zero events are detected.
(Thanks Ben H. for the feedback and suggestions.)

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-12 15:33:01 -08:00
..
appletalk net: Use PTR_RET rather than if(IS_ERR(.. [1] 2012-08-06 13:30:02 -07:00
arcnet ARCNET: remove __dev* attributes 2012-12-03 11:16:10 -08:00
bonding bonding: do not cancel works in bond_uninit() 2012-12-14 13:14:07 -05:00
caif caif: fix NULL pointer check 2012-07-24 13:54:16 -07:00
can can: sja1000: fix compilation on x86 2012-12-15 17:14:38 -08:00
cris cris: fix eth_v10.c build error 2012-08-03 20:32:31 -07:00
dsa dsa: Hide core config options; make drivers select what they need 2012-11-26 17:10:44 -05:00
ethernet be2net: fix unconditionally returning IRQ_HANDLED in INTx 2013-01-12 15:33:01 -08:00
fddi drivers/net: fix up function prototypes after __dev* removals 2012-12-07 14:22:22 -05:00
hamradio sections: fix section conflicts in drivers/net/hamradio 2012-10-06 03:04:43 +09:00
hippi drivers/net: fix up function prototypes after __dev* removals 2012-12-07 14:22:22 -05:00
hyperv hyperv: Add an error message to rndis_filter_set_device_mac() 2012-11-30 15:02:56 -05:00
ieee802154 ieee802154: remove __dev* attributes 2012-12-03 11:16:56 -08:00
irda drivers/net: fix up function prototypes after __dev* removals 2012-12-07 14:22:22 -05:00
phy net: phy: smsc: Fix config_init typo 2012-12-07 14:26:15 -05:00
plip
ppp ppp: make ppp_get_stats64 static 2012-11-01 12:38:31 -04:00
slip drivers: net: Remove casts to same type 2012-06-06 09:31:33 -07:00
team team: fix hw_features setup 2012-11-28 11:39:22 -05:00
usb net: qmi_wwan: add Telekom Speedstick LTE II 2012-12-28 15:28:34 -08:00
vmxnet3 vmxnet3: remove __dev* attributes 2012-12-03 11:17:06 -08:00
wan Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
wimax i2400m: add Intel 6150 device IDs 2012-12-15 17:14:38 -08:00
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2013-01-09 11:01:37 -05:00
xen-netback xen: netback: handle compound page fragments on transmit. 2012-10-10 22:50:45 -04:00
dummy.c net: fix race condition in several drivers when reading stats 2012-07-22 12:12:32 -07:00
eql.c
ifb.c
Kconfig vxlan: Depend on CONFIG_INET 2012-10-02 14:37:31 -04:00
LICENSE.SRC
loopback.c net: loopback: set default mtu to 64K 2012-09-24 16:23:53 -04:00
macvlan.c netlink: add attributes to fdb interface 2012-10-01 18:39:44 -04:00
macvtap.c macvtap: rcu_dereference outside read-lock section 2012-08-12 13:40:48 -07:00
Makefile vxlan: virtual extensible lan 2012-10-01 18:39:45 -04:00
mdio.c
mii.c
netconsole.c netconsole: add oops_only module option 2012-11-08 22:06:36 -05:00
rionet.c rapidio/rionet: rework to support multiple RIO master ports 2012-10-06 03:05:23 +09:00
sb1000.c
Space.c
sungem_phy.c Fix misspellings of "whether" in comments. 2012-11-19 14:31:35 +01:00
tun.c tuntap: fix leaking reference count 2013-01-11 19:42:02 -08:00
veth.c rtnelink: remove unused parameter from rtnl_create_link(). 2012-11-30 12:24:40 -05:00
virtio_net.c Some nice cleanups, and even a patch my wife did as a "live" demo for 2012-12-20 08:37:05 -08:00
vxlan.c vxlan: allow live mac address change 2013-01-03 01:58:13 -08:00
xen-netfront.c xen/netfront: improve truesize tracking 2013-01-07 19:51:19 -08:00