[Bug 1805088] Re: iwlwifi fails to work on 16 or more logical CPUs machines

There is a new kernel just uploaded, Ubuntu-4.15.0-43.46
but it looks like kernel team miss this patch.
According to the schedule[1], the next kernel in -proposed would be at Jan. 21st 2019

BTW, the above comment #3 is for oem kernel 4.15.0-1029.

1. http://kernel.ubuntu.com/

** Also affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New

** Changed in: linux-oem (Ubuntu Bionic)
Status: New => Fix Committed

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1805088

Title:
iwlwifi fails to work on 16 or more logical CPUs machines

Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem package in Ubuntu:
New
Status in linux source package in Bionic:
In Progress
Status in linux-oem source package in Bionic:
Fix Committed

Bug description:
[Impact]
Got dmesg kernel BUG while loading iwlwifi driver on machines which has 16 or more logical CPUs
kernel: RIP: 0010:iwl_pcie_rxq_alloc_rbs+0x1d0/0x1f0 [iwlwifi]
And it leads to wifi can't scan any APs, and leads to system hangs while suspending.

[Fix]
Below commit contained in v4.17 fix the issue.
ab1068d6866e iwlwifi: pcie: compare with number of IRQs requested for, not number of CPUs

[Regression Potential]
Low.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1805088/+subscriptions