Subash Abhinov Kasiviswanathan b37f78f234 net: qualcomm: rmnet: Fix crash on real dev unregistration ... With CONFIG_DEBUG_PREEMPT enabled, a crash with the following call stack was observed when removing a real dev which had rmnet devices attached to it. To fix this, remove the netdev_upper link APIs and instead use the existing information in rmnet_port and rmnet_priv to get the association between real and rmnet devs. BUG: sleeping function called from invalid context in_atomic(): 0, irqs_disabled(): 0, pid: 5762, name: ip Preemption disabled at: [<ffffff9d49043564>] debug_object_active_state+0xa4/0x16c Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: PC is at ___might_sleep+0x13c/0x180 LR is at ___might_sleep+0x17c/0x180 [<ffffff9d48ce0924>] ___might_sleep+0x13c/0x180 [<ffffff9d48ce09c0>] __might_sleep+0x58/0x8c [<ffffff9d49d6253c>] mutex_lock+0x2c/0x48 [<ffffff9d48ed4840>] kernfs_remove_by_name_ns+0x48/0xa8 [<ffffff9d48ed6ec8>] sysfs_remove_link+0x30/0x58 [<ffffff9d49b05840>] __netdev_adjacent_dev_remove+0x14c/0x1e0 [<ffffff9d49b05914>] __netdev_adjacent_dev_unlink_lists+0x40/0x68 [<ffffff9d49b08820>] netdev_upper_dev_unlink+0xb4/0x1fc [<ffffff9d494a29f0>] rmnet_dev_walk_unreg+0x6c/0xc8 [<ffffff9d49b00b40>] netdev_walk_all_lower_dev_rcu+0x58/0xb4 [<ffffff9d494a30fc>] rmnet_config_notify_cb+0xf4/0x134 [<ffffff9d48cd21b4>] raw_notifier_call_chain+0x58/0x78 [<ffffff9d49b028a4>] call_netdevice_notifiers_info+0x48/0x78 [<ffffff9d49b0b568>] rollback_registered_many+0x230/0x3c8 [<ffffff9d49b0b738>] unregister_netdevice_many+0x38/0x94 [<ffffff9d49b1e110>] rtnl_delete_link+0x58/0x88 [<ffffff9d49b201dc>] rtnl_dellink+0xbc/0x1cc [<ffffff9d49b2355c>] rtnetlink_rcv_msg+0xb0/0x244 [<ffffff9d49b5230c>] netlink_rcv_skb+0xb4/0xdc [<ffffff9d49b204f4>] rtnetlink_rcv+0x34/0x44 [<ffffff9d49b51af0>] netlink_unicast+0x1ec/0x294 [<ffffff9d49b51fdc>] netlink_sendmsg+0x320/0x390 [<ffffff9d49ae6858>] sock_sendmsg+0x54/0x60 [<ffffff9d49ae6f94>] ___sys_sendmsg+0x298/0x2b0 [<ffffff9d49ae98f8>] SyS_sendmsg+0xb4/0xf0 [<ffffff9d48c83770>] el0_svc_naked+0x24/0x28 Fixes: ceed73a2cf ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation") Fixes: 60d58f971c ("net: qualcomm: rmnet: Implement bridge mode") Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-02-19 11:17:33 -05:00
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appletalk
arcnet
bonding	net: bonding: Replace mac address parsing	2017-12-20 12:47:29 -05:00
caif	net: caif: remove redundant re-assignment of pointer pfrm	2018-01-22 10:51:56 -05:00
can	can: migrate documentation to restructured text	2018-01-26 10:46:44 +01:00
cris
dsa	net: dsa: mv88e6xxx: Free ATU/VTU irq only when there is chip irq	2018-01-19 15:57:02 -05:00
ethernet	net: qualcomm: rmnet: Fix crash on real dev unregistration	2018-02-19 11:17:33 -05:00
fddi
fjes
hamradio
hippi
hyperv	hv_netvsc: Use the num_online_cpus() for channel limit	2018-01-22 16:24:08 -05:00
ieee802154	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
ipvlan
netdevsim	netdevsim: fix overflow on the error path	2018-02-01 11:22:51 +01:00
phy	net: phy: fix wrong mask to phy_modify()	2018-02-12 11:42:48 -05:00
plip
ppp	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
slip
team
usb	r8152: set rx mode early when linking on	2018-02-02 19:19:00 -05:00
vmxnet3	vmxnet3: remove redundant initialization of pointer 'rq'	2018-02-01 14:54:28 -05:00
wan	Merge branch 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-30 17:58:07 -08:00
wimax	treewide: Use DEVICE_ATTR_WO	2018-01-09 16:34:35 +01:00
wireless	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
xen-netback
dummy.c
eql.c
geneve.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-01-29 10:15:51 -05:00
gtp.c
ifb.c
Kconfig
LICENSE.SRC
loopback.c
macsec.c	macsec: restore uAPI after addition of GCM-AES-256	2018-01-22 15:40:16 -05:00
macvlan.c	macvlan: Fix one possible double free	2018-01-02 13:30:14 -05:00
macvtap.c
Makefile
mdio.c
mii.c
netconsole.c
nlmon.c
ntb_netdev.c
rionet.c
sb1000.c
Space.c
sungem_phy.c
tap.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
thunderbolt.c	net: thunderbolt: Run disconnect flow asynchronously when logout is received	2018-02-12 12:03:04 -05:00
tun.c	tun: fix tun_napi_alloc_frags() frag allocator	2018-02-16 16:20:46 -05:00
veth.c
virtio_net.c	virtio_net: Add ethtool stats	2018-01-22 15:25:37 -05:00
vrf.c	net: vrf: Add support for sends to local broadcast address	2018-01-25 21:51:03 -05:00
vsockmon.c
vxlan.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-01-29 10:15:51 -05:00
xen-netfront.c	xen-netfront: Fix race between device setup and open	2018-02-06 09:55:40 +01:00