NACK[F]/CMT: [PATCH 0/1][SRU][OEM-B-OSP1][F][OEM-5.6][G] Thunderbolt3 daisy chain sometimes doesn't work

[AceLan Kao]

Sorry, my fault.
This patch works after v5.6-rc1, I'll submit v2 for focal and oem-b-osp1 soon.

Kelsey Skunberg <kelsey.skunberg at canonical.com> 於 2020年9月18日 週五 上午6:18寫道：
>
> This breaks Focal/master-next and has been dropped.
>
> Ian troubleshooted this for us and found the build fails due to not
> finding 'tb_drom_read_n'. This has not been introduced to Focal yet.
>
> upstream patch that adds 'tb_drom_read_n': b04079837b20 ("thunderbolt:
> Add initial support for USB4")
>
> For Focal, may you please include any additional backports, test, and
> submit a v2? Thank you!
>
> -Kelsey
>
> On 2020-09-15 11:32:19 , AceLan Kao wrote:
> > BugLink: https://bugs.launchpad.net/bugs/1895606
> >
> > [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.
> >
> > Mika Westerberg (1):
> >   thunderbolt: Retry DROM read once if parsing fails
> >
> >  drivers/thunderbolt/eeprom.c | 20 ++++++++++++++++----
> >  1 file changed, 16 insertions(+), 4 deletions(-)
> >
> > --
> > 2.25.1
> >
> >
> > --
> > kernel-team mailing list
> > kernel-team at lists.ubuntu.com
> > https://lists.ubuntu.com/mailman/listinfo/kernel-team