[Bug 1998765] Re: libnl3 3.4.0 doesn't work with WCN3980

[Timo Aaltonen]

** Also affects: libnl3 (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Changed in: libnl3 (Ubuntu)
       Status: New => Fix Released

** Also affects: libnl3 (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: libnl3 (Ubuntu Jammy)
       Status: New => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Sponsors Team, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1998765

Title:
  libnl3 3.4.0 doesn't work with WCN3980

Status in OEM Priority Project:
  New
Status in OEM Priority Project focal series:
  New
Status in libnl3 package in Ubuntu:
  Fix Released
Status in libnl3 source package in Focal:
  New
Status in libnl3 source package in Jammy:
  Invalid

Bug description:
  [ Impact ] 
  When testing Qualcomm qcs410 with WCN3980 with 20.04 and UC20, WCN3980 is not able connect to an AP.

  However, with the libnl3 (3.5.0) from BSP, WCN3980 can work correctly.

  After bisecting the commits from 3.4.0 to 3.5.0, this commit[1] is
  identified as the root cause.

  According to the commit, the "NLA_F_NESTED" flag should be set for
  kernel later than 5.2.

  [ Test Plan ]
  Verify with the updated version, the WIFI module can:
    1. scan WIFI networks
    2. connect to an available network
    3. access to the connected network

  [ Where problems could occur ]
  1. kernel versions without NLA_F_NESTED flag defined
    This flag is introduced before Linux kernel v5 (checked v3.x and v4.x have it). It would not be a problem for an older kernel to understand/work with this change. Since the GA kernel is 5.4, so a generic image would still work.

  2. Drivers don't use the NESTED flag.
    According to hui.wang's input, this change should not affect drivers which don't use the NESTED flag. But, it'd be better to cover more Wifi modules.

  [ Other Info ]
  22.04 is using libnl3 3.0.5-0.1, so only 20.04 needs this patch.

  
  [1] https://github.com/thom311/libnl/commit/7de65a051fb37ece16f896a7385073274b77a133

To manage notifications about this bug go to:
https://bugs.launchpad.net/oem-priority/+bug/1998765/+subscriptions