IB/mad: Don't call to function that might sleep while in atomic context
[ Upstream commit
5c20311d76cbaeb7ed2ecf9c8b8322f8fc4a7ae3 ]
Tracepoints are not allowed to sleep, as such the following splat is
generated due to call to ib_query_pkey() in atomic context.
WARNING: CPU: 0 PID:
1888000 at kernel/trace/ring_buffer.c:2492 rb_commit+0xc1/0x220
CPU: 0 PID:
1888000 Comm: kworker/u9:0 Kdump: loaded Tainted: G OE --------- - - 4.18.0-305.3.1.el8.x86_64 #1
Hardware name: Red Hat KVM, BIOS 1.13.0-2.module_el8.3.0+555+
a55c8938 04/01/2014
Workqueue: ib-comp-unb-wq ib_cq_poll_work [ib_core]
RIP: 0010:rb_commit+0xc1/0x220
RSP: 0000:
ffffa8ac80f9bca0 EFLAGS:
00010202
RAX:
ffff8951c7c01300 RBX:
ffff8951c7c14a00 RCX:
0000000000000246
RDX:
ffff8951c707c000 RSI:
ffff8951c707c57c RDI:
ffff8951c7c14a00
RBP:
0000000000000000 R08:
0000000000000000 R09:
0000000000000000
R10:
ffff8951c7c01300 R11:
0000000000000001 R12:
0000000000000246
R13:
0000000000000000 R14:
ffffffff964c70c0 R15:
0000000000000000
FS:
0000000000000000(0000) GS:
ffff8951fbc00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
00007f20e8f39010 CR3:
000000002ca10005 CR4:
0000000000170ef0
Call Trace:
ring_buffer_unlock_commit+0x1d/0xa0
trace_buffer_unlock_commit_regs+0x3b/0x1b0
trace_event_buffer_commit+0x67/0x1d0
trace_event_raw_event_ib_mad_recv_done_handler+0x11c/0x160 [ib_core]
ib_mad_recv_done+0x48b/0xc10 [ib_core]
? trace_event_raw_event_cq_poll+0x6f/0xb0 [ib_core]
__ib_process_cq+0x91/0x1c0 [ib_core]
ib_cq_poll_work+0x26/0x80 [ib_core]
process_one_work+0x1a7/0x360
? create_worker+0x1a0/0x1a0
worker_thread+0x30/0x390
? create_worker+0x1a0/0x1a0
kthread+0x116/0x130
? kthread_flush_work_fn+0x10/0x10
ret_from_fork+0x35/0x40
---[ end trace
78ba8509d3830a16 ]---
Fixes: 821bf1de45a1 ("IB/MAD: Add recv path trace point")
Signed-off-by: Leonid Ravich <lravich@gmail.com>
Link: https://lore.kernel.org/r/Y2t5feomyznrVj7V@leonid-Inspiron-3421
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>