Re: [PATCH] [v3] serial: 8250: remove obsolete and broken PORT_RSA support

[Andy Shevchenko]

On Mon, Oct 19, 2026 at 10:56:55AM +0200, Arnd Bergmann wrote:

> For all I can tell, the RSA support in the 8250 driver is not functional
> and has not been for a long time.
> 
> The RSA-DV II/S ISA card[1] was sold by IODATA in the 1990s as a faster
> alternative to regular ISA serial ports, and it was discontinued in
> 2002. Linux support was added by Kiyokazu SUTO in 2000.
> 
> The driver defines an I/O port base address of -8 (negative eight),
> which should always get refused by request_region on all architectures
> for being outside of the valid resource range.
> 
> Further, it seems that a patch to setserial would be required in order
> to set PORT_RSA when not using autoconfiguration.
> 
> This patch removes all code related to the RSA support, with the exception
> of the user-visible PORT_RSA definition.

> Link: http://translate.google.com/translate?hl=en&sl=ja&u=http://www.iodata.jp/products/network/rsadv2s.htm

Can we get this without translate? As it adds an unneeded layer.

> Link: https://lore.kernel.org/all/1309211120-2803-6-git-send-email-arnd@xxxxxxxx/

Also would be nice to add references to the Link tags like [1] and [2] and
mention them in the commit message where appropriate.

> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>


-- 
With Best Regards,
Andy Shevchenko