* Re: [PATCH 0/2] MIPS: Malta: Fix PCI southbridge legacy resource clashes
[not found] <alpine.DEB.2.21.2510211901530.8377@angie.orcam.me.uk>
@ 2025-10-21 20:59 ` Bjorn Helgaas
0 siblings, 0 replies; only message in thread
From: Bjorn Helgaas @ 2025-10-21 20:59 UTC (permalink / raw)
To: Maciej W. Rozycki
Cc: Thomas Bogendoerfer, Ilpo Järvinen, Bjorn Helgaas,
linux-mips, linux-kernel, linux-pci
[+cc linux-pci]
On Tue, Oct 21, 2025 at 08:38:15PM +0100, Maciej W. Rozycki wrote:
> Hi,
>
> This mini patch series sorts out issues with southbridge legacy resource
> management on the MIPS Malta platform. Two changes turned out required,
> because merely removing the clash would regress the PS/2 interfaces, fixed
> by accident with the PCIBIOS_MIN_IO fix.
>
> This does prove nobody has used these interfaces since forever, or most
> likely since the move to the new serio driver. Things most likely worked
> fine with 2.4 and I still have such old Malta kernel builds lying around
> (though sadly no hardware to try with), although I do know I've never used
> the PS/2 stuff with this platform, e.g. quoting an arbitrarily picked
> 2.4.19-rc1 bootstrap log:
>
> CPU revision is: 00018101
> Primary instruction cache 16kb, linesize 32 bytes(4 ways)
> Primary data cache 16kb, linesize 32 bytes (4 ways)
> Linux version 2.4.19-rc1 (macro@macro.ds2.pg.gda.pl) (gcc version 2.95.4 20010319 (prerelease)) #1 Fri Aug 23 02:55:02 CEST 2002
> [...]
> parport0: PC-style at 0x378 [PCSPP,EPP]
> initialize_kbd: Keyboard reset failed, no ACK
> Detected PS/2 Mouse Port.
> pty: 256 Unix98 ptys configured
> keyboard: Timeout - AT keyboard not present?(ed)
> keyboard: Timeout - AT keyboard not present?(f4)
> Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ DETECT_IRQ SERIAL_PCI enabled
> [...]
>
> However to prevent the PS/2 interfaces from getting fixed and then broken
> again with backports in a random fashion I have marked both changes for
> backporting as appropriate.
>
> Bjorn, may I request that these changes be placed, with Thomas's ack of
> course (hopefully a formality), ahead of Ilpo's commit 16fbaba2b78f
> ("MIPS: Malta: Use pcibios_align_resource() to block io range") (or
> whatever the latest version is, as said commit seems to be missing tags
> updates you mentioned), and then merged via your tree? That will prevent
> things from breaking just to be fixed again shortly, and overall getting
> out of sync.
>
> See individual commit descriptions for details.
>
> Maciej
Applied with Thomas's acks to pci/for-linus for v6.18, thanks!
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