On Mon, Oct 24, 2022 at 07:27:10PM +0200, Pavel Machek wrote:
Hi!
From: Maciej W. Rozycki macro@orcam.me.uk
commit 9906890c89e4dbd900ed87ad3040080339a7f411 upstream.
A SERIAL_8250_16550A_VARIANTS configuration option has been recently defined that lets one request the 8250 driver not to probe for 16550A device features so as to reduce the driver's device startup time in virtual machines.
Some actual hardware devices require these features to have been fully determined however for their driver to work correctly, so define a flag to let drivers request full 16550A feature probing on a device-by-device basis if required regardless of the SERIAL_8250_16550A_VARIANTS option setting chosen.
As far as I can see, the UPF_FULL_PROBE is never set in 5.10.150 tree, so we should not need it there.
Ah, yes, it was tagged wrong. I'll go drop this now, it's only needed in 5.15.y
thanks,
greg k-h