** Tags added: kernel-daily-bug
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https://bugs.launchpad.net/bugs/1945361
Title:
[Yellow Carp] USB4 interdomain communication problems
Status in AMD:
Fix Released
Status in linux-oem-5.14 package in Ubuntu:
Invalid
Status in linux-oem-5.14 source package in Focal:
Fix Released
Bug description:
[Impact]
Yellow carp w/ SW CM bi-directional interdomain communication may
have some problems that the response packets are lost sometimes within
the stipulated time.
[Fix]
Enable the retry by increasing retry count from 1 to 4.
The patch is in linux-next (tag next-20211007) and can be found @
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/drivers/thunderbolt/ctl.c?id=641cdbea7635be3a177dbdf81356ccb16f3769e3
[Test]
This is requested and tested by AMD.
[Where problems could occur]
Low risk. This only affects small number of AMD systems that would
excess the time. Systems without problems won't be affected.
===== Original Description ====
AMD internal team has found that for Yellow carp w/ SW CM bi-
directional interdomain communication may have some problems. It's
been aligned upstream to increase number of retries to account for
these issues.
https://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt.git/commit/?h=next&id=641cdbea7635be3a177dbdf81356ccb16f3769e3
Can Canonical team please include this in future 5.14-OEM?
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