Public bug reported:
[Impact]
The xr-usb-serial custom (downstream vendor) driver was added in Xenial LTS
kernel
to add support for USB UART chips:
Family: USB UART
Part Numbers:
XR21V1410, XR21V1412, XR21V1414,
XR21B1411, XR21B1420, XR21B1422,
XR21B1424, XR22801, XR22802,
XR22804
[Fix]
In 5.13.x, support for these devices was added to the kernel via. following
patch series:
Link: https://lore.kernel.org/all/[email protected]/
There have been long term maintenance challenges with the downstream vendor
driver
over the period of time (since 4.4.y based Xenial LTS). Now that upstream
driver
supports most of the above part numbers, let's remove this redundant
out-of-tree driver.
[Test]
The driver was functionally verified to work fine with XR21V1412. The support
for
other chips with part numbers mentioned above are also supported with the above
patch series.
[Where problems could occur]
Low. The downstream driver was designed to work with specific BIOS configs only
defined on an IoT GW project which is locked to use only Xenial ESM and Bionic
LTS
kernels, there is a low chance of regression on the Impish series.
** Affects: linux (Ubuntu)
Importance: High
Status: Confirmed
** Affects: linux (Ubuntu Impish)
Importance: High
Status: Confirmed
** Also affects: linux (Ubuntu Impish)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Impish)
Status: New => Confirmed
** Changed in: linux (Ubuntu Impish)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1945938
Title:
[impish] Remove the downstream xr-usb-uart driver
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