Re: [PATCH] [v3] serial: 8250: remove obsolete and broken PORT_RSA support
From: Jiri Slaby
Date: Mon Oct 19 2026 - 11:47:24 EST
On 19. 10. 26, 10:56, Arnd Bergmann wrote:
From: Arnd Bergmann <arnd@xxxxxxxx>
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
Link: https://lore.kernel.org/all/1309211120-2803-6-git-send-email-arnd@xxxxxxxx/
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Jiri Slaby <jirislaby@xxxxxxxxxx>
--
js
suse labs