[Bug 2060904] Re: Fix the RTL8852CE BT FW Crash based on SER false alarm

** Changed in: linux (Ubuntu Mantic)
Status: In Progress => Fix Committed

** Changed in: linux (Ubuntu Noble)
Status: In Progress => Fix Committed

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

Title:
Fix the RTL8852CE BT FW Crash based on SER false alarm

Status in HWE Next:
New
Status in linux package in Ubuntu:
New
Status in linux-firmware package in Ubuntu:
In Progress
Status in linux-oem-6.5 package in Ubuntu:
Invalid
Status in linux-oem-6.8 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Won't Fix
Status in linux-firmware source package in Jammy:
Fix Committed
Status in linux-oem-6.5 source package in Jammy:
Fix Released
Status in linux-oem-6.8 source package in Jammy:
Invalid
Status in linux source package in Mantic:
Fix Committed
Status in linux-firmware source package in Mantic:
In Progress
Status in linux-oem-6.5 source package in Mantic:
Invalid
Status in linux-oem-6.8 source package in Mantic:
Invalid
Status in linux source package in Noble:
Fix Committed
Status in linux-firmware source package in Noble:
Fix Committed
Status in linux-oem-6.5 source package in Noble:
Invalid
Status in linux-oem-6.8 source package in Noble:
New

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.

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