[SRU] [F/G/Unstable/OEM-5.6] [PATCH 0/1] Fix system reboot when disconnecting WiFi

Kai-Heng Feng kai.heng.feng at canonical.com
Wed Oct 14 03:35:22 UTC 2020

BugLink: https://bugs.launchpad.net/bugs/1899726

Hardware triggrs reboot when disconnecting WiFi connection.

There's a DMA bug in Intel WiFi 9000 needs to be limits to 6 RX queue

With the patch applied, a 1000 times of connect/disconnect loop doesn't
bring the system down.

[Regression Potential]
Not that I can think of. Hypothetically reducing RX queue rings will
reduce the RX speed, but the wireless transfter is a lot slower then DMA
operation, so we won't see any difference.

Mordechay Goodstein (1):
  iwlwifi: msix: limit max RX queues for 9000 family

 drivers/net/wireless/intel/iwlwifi/iwl-trans.h  | 1 +
 drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)


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