Fixed
Created: Jun 5, 2018
Updated: Dec 3, 2018
Resolved Date: Jun 24, 2018
Found In Version: 10.17.41.1
Fix Version: 10.17.41.9
Severity: Standard
Applicable for: Wind River Linux LTS 17
Component/s: Kernel
The below call trace in kernel log occurd during network wakeup from sleep (S3) state,
-------------
Apr 23 21:25:32 XRX9C934E6B722B kernel: [ 2953.246578] BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:995
Apr 23 21:25:32 XRX9C934E6B722B kernel: [ 2953.246580] in_atomic(): 1, irqs_disabled(): 1, pid: 28931, name: kworker/u8:1
Apr 23 21:25:32 XRX9C934E6B722B kernel: [ 2953.246591] Preemption disabled at:[<ffffffff81386b5a>] pci_bus_write_config_word.part.0+0x2a/0x70
......
Apr 23 21:25:32 XRX9C934E6B722B kernel: [ 2953.246697] [<ffffffff81367cb7>] ? debug_smp_processor_id+0x17/0x20
Apr 23 21:25:32 XRX9C934E6B722B kernel: [ 2953.246700] [<ffffffff8188604f>] ret_from_fork+0x1f/0x40
Apr 23 21:25:32 XRX9C934E6B722B kernel: [ 2953.246703] [<ffffffff81079050>] ? kthread_worker_fn+0x1c0/0x1c0
-----------------
This issue is intermittent and can be reproduced by waking up the Intel APL SoC from S3 state with network ping request.
I see similar bug in the following link:
https://patchwork.kernel.org/patch/7450321/
https://github.com/0day-ci/linux/commit/cee3c9d2e69841c6ade288bb4418b3da8ea866f3
But it seems the patche is not applicable, it depends on simple wait queue implementation, which is also not in mainline kernel:
https://patchwork.kernel.org/patch/2161261/
Please help look into this issue and let me know the if it's kernel defect.
Intel Oxbow Hill reference board can be used for reproducing this issue. Steps for reproducing this issue.
1) Boot the Intel reference board with debug console connected to serial port.
2) LAN connection also need to be setup
3) login to Linux prompt
4) Note down the board IP address
5) Put in S3 state using the command, "echo "mem" > /sys/power/state"
6) Ping the board IP from the test PC.
The steps are from customer, I didn't reproduced this since I didn't find Intel Oxbow Hill reference board in VLM.
