[SRU] [PATCH 0/1] Fix NULL pointer dereference caused by Intel WiFi

Kai-Heng Feng kai.heng.feng at canonical.com
Wed Jan 3 03:19:14 UTC 2024


BugLink: https://bugs.launchpad.net/bugs/2046217

[Impact]
When iwlwifi firmware causes the WiFi NIC dropped off PCI bus on system
resume, NULL pointer dereference occurs and the system stops working.

[Fix]
Rescan the bus in order to reprobe the device to avoid mac80211 layer
gets messed up.

[Test]
With the fix in place, system keeps working after firmware issue occurs.
Verified with thousand times of suspend.

[Where problems could occur]
If the firmware/hardware is really dead and beyond recoverable, the same
process can be triggered again and again.

Johannes Berg (1):
  wifi: iwlwifi: pcie: rescan bus if no parent

 drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 6 ++++++
 1 file changed, 6 insertions(+)

-- 
2.34.1




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