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SubjectRe: [PATCH v2 2/2] serial: 8250: Report which option to enable for blacklisted PCI devices
On Sun, 27 Feb 2022, Maciej W. Rozycki wrote:

> > > We don't do this for any other driver subsystem, so why is it really
> > > needed? What is so special about this driver that distros can't
> > > just enable all of the drivers and all is good? What is keeping those
> > > drivers fromb eing enabled?
> >
> > My justification is we have a supposedly generic PCI 8250 UART driver,
> > except it explicitly and silently refuses to handle a handful of devices
> > chosen by their PCI IDs based on that they may have extra features, even
> > though they are otherwise fully compatible with a generic 8250.
>
> Actually as it happens we do have a precedent too, as here's what I have
> just spotted on my laptop by chance when hibernating:
>
> psmouse serio1: synaptics: The touchpad can support a better bus than the too old PS/2 protocol. Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.
>
> (with a distribution kernel, so clearly whoever packaged that has not
> enabled what might be needed). Someone else wanted to be helpful too as
> it seems.

I have now posted v3 with these clarifications included in the change
descriptions. Please review.

Maciej

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