Thomas Falcon 1d1bbc37f8 ibmvnic: Fix non-atomic memory allocation in IRQ context ... ibmvnic_reset allocated new reset work item objects in a non-atomic context. This can be called from a tasklet, generating the output below. Allocate work items with the GFP_ATOMIC flag instead. BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 93, name: kworker/0:2 INFO: lockdep is turned off. irq event stamp: 66049 hardirqs last enabled at (66048): [<c000000000122468>] tasklet_action_common.isra.12+0x78/0x1c0 hardirqs last disabled at (66049): [<c000000000befce8>] _raw_spin_lock_irqsave+0x48/0xf0 softirqs last enabled at (66044): [<c000000000a8ac78>] dev_deactivate_queue.constprop.28+0xc8/0x160 softirqs last disabled at (66045): [<c0000000000306e0>] call_do_softirq+0x14/0x24 CPU: 0 PID: 93 Comm: kworker/0:2 Kdump: loaded Not tainted 4.20.0-rc6-00001-g1b50a8f03706 #7 Workqueue: events linkwatch_event Call Trace: [c0000003fffe7ae0] [c000000000bc83e4] dump_stack+0xe8/0x164 (unreliable) [c0000003fffe7b30] [c00000000015ba0c] ___might_sleep+0x2dc/0x320 [c0000003fffe7bb0] [c000000000391514] kmem_cache_alloc_trace+0x3e4/0x440 [c0000003fffe7c30] [d000000005b2309c] ibmvnic_reset+0x16c/0x360 [ibmvnic] [c0000003fffe7cc0] [d000000005b29834] ibmvnic_tasklet+0x1054/0x2010 [ibmvnic] [c0000003fffe7e00] [c0000000001224c8] tasklet_action_common.isra.12+0xd8/0x1c0 [c0000003fffe7e60] [c000000000bf1238] __do_softirq+0x1a8/0x64c [c0000003fffe7f90] [c0000000000306e0] call_do_softirq+0x14/0x24 [c0000003f3967980] [c00000000001ba50] do_softirq_own_stack+0x60/0xb0 [c0000003f39679c0] [c0000000001218a8] do_softirq+0xa8/0x100 [c0000003f39679f0] [c000000000121a74] __local_bh_enable_ip+0x174/0x180 [c0000003f3967a60] [c000000000bf003c] _raw_spin_unlock_bh+0x5c/0x80 [c0000003f3967a90] [c000000000a8ac78] dev_deactivate_queue.constprop.28+0xc8/0x160 [c0000003f3967ad0] [c000000000a8c8b0] dev_deactivate_many+0xd0/0x520 [c0000003f3967b70] [c000000000a8cd40] dev_deactivate+0x40/0x60 [c0000003f3967ba0] [c000000000a5e0c4] linkwatch_do_dev+0x74/0xd0 [c0000003f3967bd0] [c000000000a5e694] __linkwatch_run_queue+0x1a4/0x1f0 [c0000003f3967c30] [c000000000a5e728] linkwatch_event+0x48/0x60 [c0000003f3967c50] [c0000000001444e8] process_one_work+0x238/0x710 [c0000003f3967d20] [c000000000144a48] worker_thread+0x88/0x4e0 [c0000003f3967db0] [c00000000014e3a8] kthread+0x178/0x1c0 [c0000003f3967e20] [c00000000000bfd0] ret_from_kernel_thread+0x5c/0x6c Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-12-10 17:34:25 -08:00
..
ehea	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-10-03 21:00:17 -07:00
emac	Revert "net/ibm/emac: wrong bit is used for STA control"	2018-12-07 22:37:27 -08:00
ibmveth.c	net: ethernet: remove redundant include	2018-09-18 20:07:27 -07:00
ibmveth.h	ibmveth: Support to enable LSO/CSO for Trunk VEA.	2017-05-21 13:29:01 -04:00
ibmvnic.c	ibmvnic: Fix non-atomic memory allocation in IRQ context	2018-12-10 17:34:25 -08:00
ibmvnic.h	ibmvnic: Convert reset work item mutex to spin lock	2018-12-10 17:34:25 -08:00
Kconfig	Driver for IBM System i/p VNIC protocol	2015-12-28 00:12:13 -05:00
Makefile	Driver for IBM System i/p VNIC protocol	2015-12-28 00:12:13 -05:00