[SRU][J/L][PATCH 0/1] Fix suspend hang on Lenovo workstation

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/2034479

[Impact]
The system hang after resume from S3.
Error logs:
kernel: igb 0000:02:00.0: disabling already-disabled device
kernel: WARNING: CPU: 0 PID: 277 at drivers/pci/pci.c:2248
pci_disable_device+0xc4/0xf0
kernel: RIP: 0010:pci_disable_device+0xc4/0xf0
kernel: Call Trace:
kernel: <TASK>
kernel: igb_io_error_detected+0x3e/0x60
kernel: report_error_detected+0xd6/0x1c0
kernel: ? __pfx_report_normal_detected+0x10/0x10
kernel: report_normal_detected+0x16/0x30
kernel: pci_walk_bus+0x74/0xa0
kernel: pcie_do_recovery+0xb9/0x340
kernel: ? __pfx_aer_root_reset+0x10/0x10
kernel: aer_process_err_devices+0x168/0x220
kernel: aer_isr+0x1b5/0x1e0
kernel: ? __pfx_irq_thread_fn+0x10/0x10
kernel: irq_thread_fn+0x21/0x70
kernel: irq_thread+0xf8/0x1c0
kernel: ? __pfx_irq_thread_dtor+0x10/0x10
kernel: ? __pfx_irq_thread+0x10/0x10
kernel: kthread+0xef/0x120
kernel: ? __pfx_kthread+0x10/0x10
kernel: ret_from_fork+0x29/0x50
kernel: </TASK>
kernel: ---[ end trace 0000000000000000 ]---

[Fix]
The pci io error detected ops is called before the driver resumed.
Avoid this race condition to fix the issue.

[Test]
Tested on hardware, the system suspend/resume OK.

[Where problems could occur]
It may break igb driver.

The commit is included in 6.5-rc1 and merged by stable update in
oem-6.1, SRU for Jammy and Lunar.

Ying Hsu (1):
  igb: Fix igb_down hung on surprise removal

 drivers/net/ethernet/intel/igb/igb_main.c | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.34.1