Govindarajulu Varadarajan 6286e82850 enic: unlock napi busy poll before unmasking intr ... There is a small window between vnic_intr_unmask() and enic_poll_unlock_napi(). In this window if an irq occurs and napi is scheduled on different cpu, it tries to acquire enic_poll_lock_napi() and hits the following WARN_ON message. Fix is to unlock napi_poll before unmasking the interrupt. [ 781.121746] ------------[ cut here ]------------ [ 781.121789] WARNING: CPU: 1 PID: 0 at drivers/net/ethernet/cisco/enic/vnic_rq.h:228 enic_poll_msix_rq+0x36a/0x3c0 [enic]() [ 781.121834] Modules linked in: nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 dns_resolver coretemp intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel mgag200 ttm drm_kms_helper joydev aes_x86_64 lrw drm gf128mul mousedev glue_helper sb_edac ablk_helper iTCO_wdt iTCO_vendor_support evdev ipmi_si syscopyarea sysfillrect sysimgblt i2c_algo_bit i2c_core edac_core lpc_ich mac_hid cryptd pcspkr ipmi_msghandler shpchp tpm_tis acpi_power_meter tpm wmi processor hwmon button ac sch_fq_codel nfs lockd grace sunrpc fscache hid_generic usbhid hid ehci_pci ehci_hcd sd_mod megaraid_sas usbcore scsi_mod usb_common enic crc32c_generic crc32c_intel btrfs xor raid6_pq ext4 crc16 mbcache jbd2 [ 781.122176] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.1.0-rc6-ARCH-00040-gc46a024-dirty #106 [ 781.122210] Hardware name: Cisco Systems Inc UCSB-B200-M4/UCSB-B200-M4, BIOS B200M4.2.2.2.23.061220140128 06/12/2014 [ 781.122252] 0000000000000000 bddbbc9d655ec96e ffff880277e43da8 ffffffff81583fe8 [ 781.122286] 0000000000000000 0000000000000000 ffff880277e43de8 ffffffff8107acfa [ 781.122319] ffff880272c01000 ffff880273f18000 ffff880273f1a100 0000000000000000 [ 781.122352] Call Trace: [ 781.122364] <IRQ> [<ffffffff81583fe8>] dump_stack+0x4f/0x7b [ 781.122399] [<ffffffff8107acfa>] warn_slowpath_common+0x8a/0xc0 [ 781.122425] [<ffffffff8107ae2a>] warn_slowpath_null+0x1a/0x20 [ 781.122455] [<ffffffffa01fa9ca>] enic_poll_msix_rq+0x36a/0x3c0 [enic] [ 781.122487] [<ffffffff8148525a>] net_rx_action+0x22a/0x370 [ 781.122512] [<ffffffff8107ed3d>] __do_softirq+0xed/0x2d0 [ 781.122537] [<ffffffff8107f06e>] irq_exit+0x7e/0xa0 [ 781.122560] [<ffffffff8158c424>] do_IRQ+0x64/0x100 [ 781.122582] [<ffffffff8158a42e>] common_interrupt+0x6e/0x6e [ 781.122605] <EOI> [<ffffffff810bd331>] ? cpu_startup_entry+0x121/0x480 [ 781.122638] [<ffffffff810bd2fc>] ? cpu_startup_entry+0xec/0x480 [ 781.122667] [<ffffffff810f2ed3>] ? clockevents_register_device+0x113/0x1f0 [ 781.122698] [<ffffffff81050ab6>] start_secondary+0x196/0x1e0 [ 781.122723] ---[ end trace cec2e9dd3af7b9db ]--- Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-06-10 23:42:39 -07:00
..
appletalk
arcnet
bonding	rtnl/bond: don't send rtnl msg for unregistered iface	2015-05-17 22:43:07 -04:00
caif	caif: remove unused struct member	2015-04-01 12:43:09 -04:00
can	net: can: xilinx_can: fix extended frame handling	2015-05-01 10:11:46 +02:00
cris
dsa	net: dsa: mv88e6xxx: unregister mv88e6352 driver	2015-05-04 00:04:43 -04:00
ethernet	enic: unlock napi busy poll before unmasking intr	2015-06-10 23:42:39 -07:00
fddi
hamradio	ax25: remove unneeded NULL test in ax_xmit()	2015-03-06 21:50:42 -05:00
hippi
hyperv	hv_netvsc: remove unused variable in netvsc_send()	2015-05-05 17:31:09 -04:00
ieee802154	at86rf230: add slp_tr support to start tx	2015-04-30 18:48:11 +02:00
ipvlan	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-04-02 16:16:53 -04:00
irda
phy	amd-xgbe-phy: Fix initial mode when autoneg is disabled	2015-05-26 19:47:30 -04:00
plip
ppp	pppoe: drop pppoe device in pppoe_unbind_sock_work	2015-05-11 12:58:22 -04:00
slip
team	team: Don't segment multiple tagged packets on team device	2015-03-29 13:33:24 -07:00
usb	cdc_ncm: Fix tx_bytes statistics	2015-05-22 14:26:31 -04:00
vmxnet3	vmxnet3: spelling fixes	2015-04-01 22:52:29 -04:00
wan	cosa: fix error return code	2015-04-07 15:21:55 -04:00
wimax
wireless	* fix OTP parsing 8260	2015-05-28 16:28:03 +03:00
xen-netback	xen: netback: read hotplug script once at start of day.	2015-06-01 12:03:04 -07:00
dummy.c
eql.c
ifb.c	act_mirred: Fix bogus header when redirecting from VLAN	2015-04-17 13:29:28 -04:00
Kconfig
LICENSE.SRC
loopback.c
macvlan.c	macvlan: Propagate promiscuity setting to lower devices.	2015-05-04 00:14:13 -04:00
macvtap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-04-17 16:31:08 -04:00
Makefile
mdio.c
mii.c
netconsole.c	netconsole: Use eth_<foo>_addr instead of memset	2015-03-03 17:01:37 -05:00
nlmon.c
ntb_netdev.c
rionet.c
sb1000.c	PNP: net/sb1000: Use module_pnp_driver to register driver	2015-03-18 22:39:17 +01:00
Space.c
sungem_phy.c
tun.c	make new_sync_{read,write}() static	2015-04-11 22:29:40 -04:00
veth.c	veth: set iflink to the peer veth	2015-04-02 14:05:01 -04:00
virtio_net.c	virtio: document queue state logic	2015-04-06 16:44:24 -04:00
vxlan.c	vxlan: correct typo in call to unregister_netdevice_queue	2015-05-18 16:57:09 -04:00
xen-netfront.c	xen-netfront: properly destroy queues when removing device	2015-05-27 14:02:28 -04:00