From: Anton Blanchard <anton@samba.org>
To: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matthew Wilcox <willy@debian.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linux-kernel mailing list <linux-kernel@vger.kernel.org>,
Patrick Mochel <mochel@osdl.org>
Subject: Re: pci_domain_nr vs. /sys/devices
Date: Tue, 17 Jun 2003 22:49:50 +1000 [thread overview]
Message-ID: <20030617124950.GF8639@krispykreme> (raw)
In-Reply-To: <20030617134156.A2473@jurassic.park.msu.ru>
Hi,
> Err, this definitely breaks X on alpha. On small and mid-range
> machines we always have pci_domain_nr(bus) == bus->number.
> Practically, it's only Marvel where we could overflow an 8-bit
> bus number.
OK.
> How about this instead?
>
> /* Backwards compatibility for first N PCI domains. */
> if (pci_domain_nr(dev->bus) > PCI_PROC_MAX_DOMAIN)
> return 0;
>
> PCI_PROC_MAX_DOMAIN could be defined in asm/pci.h (255 on alpha), default 0.
A runtime test would be useful, at least for ppc64. That would allow our
older machines to work (multiple host bridges without overlapping
buses). What if we had pci_proc_max_domain and arch code could change its
value during pcibios_init?
Anton
next prev parent reply other threads:[~2003-06-17 12:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-11 14:30 pci_domain_nr vs. /sys/devices Benjamin Herrenschmidt
2003-06-11 14:48 ` Matthew Wilcox
2003-06-11 15:06 ` Benjamin Herrenschmidt
2003-06-11 15:12 ` Matthew Wilcox
2003-06-11 15:40 ` Russell King
2003-06-11 16:00 ` Benjamin Herrenschmidt
2003-06-17 4:52 ` Anton Blanchard
2003-06-11 17:03 ` Patrick Mochel
2003-06-17 4:49 ` Anton Blanchard
2003-06-17 9:41 ` Ivan Kokshaysky
2003-06-17 12:49 ` Anton Blanchard [this message]
2003-06-17 13:11 ` Ivan Kokshaysky
2003-06-17 19:42 ` Matthew Wilcox
2003-06-17 21:30 ` Ivan Kokshaysky
2003-06-18 13:02 ` Matthew Wilcox
2003-06-18 13:24 ` Ivan Kokshaysky
2003-06-17 13:55 ` Matthew Wilcox
2003-06-17 16:25 ` Matthew Wilcox
2003-06-17 18:39 ` Olaf Hering
2003-06-11 15:42 ` Russell King
2003-06-12 0:37 ` Anton Blanchard
2003-06-12 13:27 ` Benjamin Herrenschmidt
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