Fix the RTL8852CE BT FW Crash based on SER false alarm

Bug #2060904 reported by Hui Wang
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
New
Undecided
Unassigned
linux (Ubuntu)
New
Undecided
Unassigned
Jammy
New
Undecided
Hui Wang
Mantic
New
Undecided
Unassigned
Noble
New
Undecided
Unassigned
linux-firmware (Ubuntu)
In Progress
Medium
Hui Wang
Jammy
In Progress
Medium
Hui Wang
Mantic
In Progress
Medium
Unassigned
Noble
In Progress
Medium
Hui Wang
linux-oem-6.5 (Ubuntu)
Invalid
Undecided
Unassigned
Jammy
New
Undecided
Hui Wang
Mantic
Invalid
Undecided
Unassigned
Noble
Invalid
Undecided
Unassigned
linux-oem-6.8 (Ubuntu)
New
Undecided
Hui Wang
Jammy
Invalid
Undecided
Unassigned
Mantic
Invalid
Undecided
Unassigned
Noble
New
Undecided
Hui Wang

Bug Description

This is SRU template for linux kernel:

[Impact]

On a Dell laptop, let it connect to a WiFi router, connect a BT
device, then disconnect it, connect the bt device again, we expect
the device could be connected successfully, but it couldn't and
the BT firmeware crashed.

[Fix]

Need to upgrade the firmware for RTL8852CE and cherry-pick 2 kernel
patches, here we send the MR for 2 kernel patches. The firmware PR was
already sent out. And one of the patches is from linux-next, the other is
from rtw.git and is going to be merged to linux-next soon.

[Test Case]

With the upgraded firmware + kernel with the 2 kernel patches, bt
firmware will not crash anymore and bt could connect / disconnect
many many bt devices.

[Where problems could occur]

This MR comes from upstream commits, it has low possibility to
introduce regression. If the bt or wifi on this laptop couldn't
work as well as before, it is possible that this MR introduces
regression. According to our test, the wifi and bt could work well
with upgraded firmware.

===============================================================================
This SRU template is for linux-firmware:

BugLink: https://bugs.launchpad.net/bugs/2060904

[Impact]

On a Dell laptop, let it connect to a WiFi router, connect a BT
device, then disconnect it, connect the bt device again, we expect
the device could be connected successfully, but it couldn't and
the BT firmeware crashed.

[Fix]

Need to upgrade the firmware for RTL8852CE and cherry-pick 2 kernel
patches, here we send the MR for firmware first. And it is backward
compatible, the upgraded firmware could work with kernel without
those 2 patches as well as before.

[Test Case]

With the upgraded firmware + kernel without the 2 kernel patches,
the wifi and bt could work as well / bad as before.

With the upgraded firmware + kernel with the 2 kernel patches, bt
firmware will not crash anymore and bt could connect / disconnect
many many bt devices.

[Where problems could occur]

This MR comes from upstream commit, it has low possibility to
introduce regression. If the bt or wifi on this laptop couldn't
work as well as before, it is possible that this MR introduces
regression. According to our test, the wifi and bt could work well
with upgraded firmware.

Hui Wang (hui.wang)
Changed in linux-oem-6.5 (Ubuntu Mantic):
status: New → Invalid
Changed in linux-oem-6.5 (Ubuntu Noble):
status: New → Invalid
Changed in linux (Ubuntu Jammy):
assignee: nobody → Hui Wang (hui.wang)
Changed in linux-firmware (Ubuntu Jammy):
assignee: nobody → Hui Wang (hui.wang)
Changed in linux-oem-6.5 (Ubuntu Jammy):
assignee: nobody → Hui Wang (hui.wang)
Changed in linux-oem-6.8 (Ubuntu Jammy):
status: New → Invalid
Changed in linux-oem-6.8 (Ubuntu Mantic):
status: New → Invalid
Changed in linux-oem-6.8 (Ubuntu Noble):
assignee: nobody → Hui Wang (hui.wang)
tags: added: oem-priority originate-from-2059397 somerville
Hui Wang (hui.wang)
description: updated
Hui Wang (hui.wang)
Changed in linux-firmware (Ubuntu Jammy):
importance: Undecided → Medium
status: New → In Progress
Changed in linux-firmware (Ubuntu Mantic):
importance: Undecided → Medium
status: New → In Progress
Changed in linux-firmware (Ubuntu Noble):
importance: Undecided → Medium
status: New → In Progress
Hui Wang (hui.wang)
Changed in linux-oem-6.8 (Ubuntu Noble):
status: New → Invalid
status: Invalid → New
Hui Wang (hui.wang)
description: updated
Juerg Haefliger (juergh)
tags: added: kern-10584
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