linux/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
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
can can: sja1000: fix compilation on x86 2012-12-15 17:14:38 -08:00
cris
dsa
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
hippi drivers/net: fix up function prototypes after __dev* removals 2012-12-07 14:22:22 -05:00
hyperv
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
slip
team
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
dummy.c
eql.c
ifb.c
Kconfig
LICENSE.SRC
loopback.c
macvlan.c
macvtap.c
Makefile
mdio.c
mii.c
netconsole.c
rionet.c
sb1000.c
Space.c
sungem_phy.c
tun.c tuntap: fix leaking reference count 2013-01-11 19:42:02 -08:00
veth.c
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