linux-kernel - Re: [PATCH v10 06/59] PCI: Kill wrong quirk about M7101

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Date:	Sat, 12 Mar 2016 10:39:15 +0200 (EET)
From:	Meelis Roos <mroos@...ux.ee>
To:	Yinghai Lu <yinghai@...nel.org>
cc:	Bjorn Helgaas <helgaas@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	David Miller <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Wei Yang <weiyang@...ux.vnet.ibm.com>, TJ <linux@....tj>,
	Yijing Wang <wangyijing@...wei.com>,
	Khalid Aziz <khalid.aziz@...cle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v10 06/59] PCI: Kill wrong quirk about M7101

> On Fri, Mar 11, 2016 at 11:52 PM, Meelis Roos <mroos@...ux.ee> wrote:
> >> On Thu, Mar 10, 2016 at 9:40 AM, Bjorn Helgaas <helgaas@...nel.org> wrote:
> >> > On Wed, Feb 24, 2016 at 06:11:57PM -0800, Yinghai Lu wrote:
> >> >> Meelis reported that qla2000 driver does not get loaded on one sparc system.
> >> >>
> >> >> schizo f00732d0: PCI host bridge to bus 0001:00
> >> >> pci_bus 0001:00: root bus resource [io  0x7fe01000000-0x7fe01ffffff] (bus address [0x0000-0xffffff])
> >> >> pci 0001:00:06.0: quirk: [io  0x7fe01000800-0x7fe0100083f] claimed by ali7101 ACPI
> >> >> pci 0001:00:06.0: quirk: [io  0x7fe01000600-0x7fe0100061f] claimed by ali7101 SMB
> >> >> pci 0001:00:07.0: can't claim BAR 0 [io  0x7fe01000000-0x7fe0100ffff]: address conflict with 0001:00:06.0 [io  0x7fe01000600-0x7fe0100061f]
> >> >>
> >> >> So the quirk for M7101 claim the io range early.
> >
> > But why did it work until 4.2 and only with 4.3 the allocations broke?
> >
> 
> My understanding is we really install the root bus resource and try to
> do the sanitary checking
> for device resource.
> 
> Or did you find exact commit between 4.2 and 4.3 cause the problem ?

No, I have not bisected that.

-- 
Meelis Roos (mroos@...ux.ee)