commit f022ff7bf377ca94367be05de61277934d42ea74
Author: Mika Westerberg <mika.westerb...@linux.intel.com>
Date: Mon Sep 7 12:20:36 2020 +0300
thunderbolt: Retry DROM read once if parsing fails
Kai-Heng reported that sometimes DROM parsing of ASUS PA27AC Thunderbolt 3
monitor fails. This makes the driver to fail to add the device so only
DisplayPort tunneling is functional.
It is not clear what exactly happens but waiting for 100 ms and retrying
the read seems to work this around so we do that here.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206493
Reported-by: Kai-Heng Feng <kai.heng.f...@canonical.com>
Tested-by: Kai-Heng Feng <kai.heng.f...@canonical.com>
Cc: sta...@vger.kernel.org
Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com>
** Tags added: oem-priority originate-from-1855796 somerville
** Tags added: originate-from-1851798
** Bug watch added: Linux Kernel Bug Tracker #206493
https://bugzilla.kernel.org/show_bug.cgi?id=206493
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.6 in Ubuntu.
https://bugs.launchpad.net/bugs/1895606
Title:
Thunderbolt3 daisy chain sometimes doesn't work
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.6 package in Ubuntu:
Invalid
Status in linux-oem-osp1 package in Ubuntu:
Invalid
Status in linux-oem-osp1 source package in Bionic:
In Progress
Status in linux source package in Focal:
In Progress
Status in linux-oem-5.6 source package in Focal:
In Progress
Status in linux source package in Groovy:
In Progress
Bug description:
[Impact]
Plug-in thunderbolt external monitor, and then plug-in thunderbolt external
Hard drive on the external monitor, it sometimes can't detect the TBT storage.
[Fix]
Retry tb_drom_read_n() when failed fixes this issue.
[Test]
Verified on Dell platform with ASUS PA27AC Thunderbolt 3, and HP P800 TBT
storage.
[Regression Potential]
Low, it only add 100ms delay and retry once.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1895606/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
