On Tue, Nov 05, 2024 at 12:31:57PM +0200, Mika Westerberg wrote:
> Rick reported that his Pluggable USB4 dock does not work anymore after
> upgrading to v6.10 kernel.
>
> It looks like commit c6ca1ac9f472 ("thunderbolt: Increase sideband
> access polling delay") makes the device router enumeration happen later
> than what might be expected by the dock (although there is no such limit
> in the USB4 spec) which probably makes it assume there is something
> wrong with the high-speed link and reset it. After the link is reset the
> same issue happens again and again.
>
> For this reason lower the sideband access delay from 5ms to 1ms. This
> seems to work fine according to Rick's testing.
>
> Reported-by: Rick Lahaye <rick@xxxxxxxxxx>
> Closes: https://lore.kernel.org/linux-usb/000f01db247b$d10e1520$732a3f60$@581238.xyz/
> Tested-by: Rick Lahaye <rick@xxxxxxxxxx>
> Fixes: c6ca1ac9f472 ("thunderbolt: Increase sideband access polling delay")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
