linux/drivers/net
Mohammed Shafi Shajakhan 07445f6882 ath9k: Fix kernel panic during driver initilization
all works need to be initialized before ieee80211_register_hw
to prevent mac80211 call backs such as drv_start, drv_config
getting started. otherwise we would queue/cancel works before
initializing them and it leads to kernel panic.
this issue can be recreated with the following script
in Chrome laptops with AR928X cards, with background scan
running (or) Network manager is running

while true
do
sudo modprobe -v ath9k
sleep 3
sudo modprobe -r ath9k
sleep 3
done

	 EIP: [<81040a47>] __cancel_work_timer+0xb8/0xe1 SS:ESP 0068:f6be9d70
	 ---[ end trace 4f86d6139a9900ef ]---
	 Registered led device: ath9k-phy0
	 ieee80211 phy0: Atheros AR9280 Rev:2 mem=0xf88a0000,
	 irq=16
	 Kernel panic - not syncing: Fatal exception
	 Pid: 456, comm: wpa_supplicant Tainted: G      D
	 3.0.13 #1
	Call Trace:
	 [<81379e21>] panic+0x53/0x14a
	 [<81004a30>] oops_end+0x73/0x81
	 [<81004b53>] die+0x4c/0x55
	 [<81002710>] do_trap+0x7c/0x83
	 [<81002855>] ? do_bounds+0x58/0x58
	 [<810028cc>] do_invalid_op+0x77/0x81
	 [<81040a47>] ? __cancel_work_timer+0xb8/0xe1
	 [<810489ec>] ? sched_clock_cpu+0x81/0x11f
	 [<8103f809>] ? wait_on_work+0xe2/0xf7
	 [<8137f807>] error_code+0x67/0x6c
	 [<810300d8>] ? wait_consider_task+0x4ba/0x84c
	 [<81040a47>] ? __cancel_work_timer+0xb8/0xe1
	 [<810380c9>] ? try_to_del_timer_sync+0x5f/0x67
	 [<81040a91>] cancel_work_sync+0xf/0x11
	 [<f88d7b7c>] ath_set_channel+0x62/0x25c [ath9k]
	 [<f88d67d1>] ? ath9k_tx_last_beacon+0x26a/0x85c [ath9k]
	 [<f88d8899>] ath_radio_disable+0x3f1/0x68e [ath9k]
	 [<f90d0edb>] ieee80211_hw_config+0x111/0x116 [mac80211]
	 [<f90dd95c>] __ieee80211_recalc_idle+0x919/0xa37 [mac80211]
	 [<f90dda76>] __ieee80211_recalc_idle+0xa33/0xa37 [mac80211]
	 [<812dbed8>] __dev_open+0x82/0xab

Cc: <stable@vger.kernel.org>
Cc: Gary Morain <gmorain@google.com>
Cc: Paul Stewart <pstew@google.com>
Cc: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Tested-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-02-03 14:18:02 -05:00
..
appletalk
arcnet net: Revert ARCNET and PHYLIB to tristate options 2011-11-26 14:36:49 -05:00
bonding bonding: fix enslaving in alb mode when link down 2012-01-18 20:59:53 -05:00
caif module_param: make bool parameters really bool (net & drivers/net) 2011-12-19 22:27:29 -05:00
can clock management changes for i.MX 2012-01-09 14:44:15 -08:00
cris
dsa drivers/net: dsa/mv88e6xxx.c files need linux/module.h 2012-01-24 15:44:50 -05:00
ethernet stmmac: added PCI identifiers 2012-01-24 15:44:20 -05:00
fddi
hamradio
hippi net: drivers/net/hippi/Kconfig should be sourced 2011-11-09 15:55:06 -05:00
hyperv net/hyperv: fix possible memory leak in do_set_multicast() 2012-01-24 15:47:47 -05:00
irda Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2012-01-14 13:05:21 -08:00
phy kernel-doc: fix new warning in net/phy/mdio_bus.c 2012-01-22 15:08:45 -05:00
plip
ppp pptp: Accept packet with seq zero 2012-01-12 20:05:28 -08:00
slip
team team: send only changed options/ports via netlink 2012-01-24 15:51:00 -05:00
tokenring
usb asix: fix setting custom MAC address on Asix 88178 devices 2012-01-10 14:59:48 -08:00
vmxnet3 vmxnet3" make ethtool ops const 2012-01-05 13:23:00 -05:00
wan module_param: make bool parameters really bool (net & drivers/net) 2011-12-19 22:27:29 -05:00
wimax Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-01-08 13:21:22 -08:00
wireless ath9k: Fix kernel panic during driver initilization 2012-02-03 14:18:02 -05:00
xen-netback Merge branch 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2012-01-10 10:09:59 -08:00
dummy.c net: remove NETIF_F_NO_CSUM feature bit 2011-11-16 17:43:12 -05:00
eql.c
ifb.c net: remove NETIF_F_NO_CSUM feature bit 2011-11-16 17:43:12 -05:00
Kconfig Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging 2012-01-09 12:18:17 -08:00
LICENSE.SRC
loopback.c net: remove NETIF_F_NO_CSUM feature bit 2011-11-16 17:43:12 -05:00
macvlan.c macvlan: fix a possible use after free 2012-01-23 13:56:18 -05:00
macvtap.c macvtap: Fix macvtap_get_queue to use rxhash first 2011-12-20 13:45:55 -05:00
Makefile Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging 2012-01-09 12:18:17 -08:00
mdio.c
mii.c net: Change mii to ethtool advertisement function names 2011-11-21 15:27:19 -05:00
netconsole.c
rionet.c
sb1000.c
Space.c
sungem_phy.c
tun.c Sweep away N/A fw_version dustbunnies from the .get_drvinfo routine of a number of drivers 2011-11-22 16:43:32 -05:00
veth.c Sweep away N/A fw_version dustbunnies from the .get_drvinfo routine of a number of drivers 2011-11-22 16:43:32 -05:00
virtio_net.c virtio: net: Add freeze, restore handlers to support S4 2012-01-12 15:44:46 +10:30
xen-netfront.c xen-netfront: correct MAX_TX_TARGET calculation. 2012-01-26 13:48:35 -05:00