linux-kernel - Re: [PATCH v9 02/12] PCI: OF: Parse and map the IRQ when adding the PCI device.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 19 Aug 2014 13:05:30 +0100
From:	Liviu Dudau <liviu@...au.co.uk>
To:	Wei Yang <weiyang@...ux.vnet.ibm.com>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Will Deacon <Will.Deacon@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King <linux@....linux.org.uk>,
	Tanmay Inamdar <tinamdar@....com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Sinan Kaya <okaya@...eaurora.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Suravee Suthikulanit <suravee.suthikulpanit@....com>,
	linux-pci <linux-pci@...r.kernel.org>,
	linux-arch <linux-arch@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Device Tree ML <devicetree@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9 02/12] PCI: OF: Parse and map the IRQ when adding the
 PCI device.

On Tue, Aug 19, 2014 at 09:44:01AM +0800, Wei Yang wrote:
> On Mon, Aug 18, 2014 at 03:25:50PM +0100, Catalin Marinas wrote:
> >...
> >> Well, it will become necessary as old code gets dismantled and converted towards
> >> this patchset. To give you an example that I'm familiar with, for arch/arm the
> >> host bridge drivers have moved into drivers/pci/host, but they still depend/use
> >> the bios32 infrastructure that takes care of setting up the irq. When they switch
> >> to my version they would have to go and debug the "irq not being assigned" issue
> >> and it is quite likely that some of the people doing the conversion will complain
> >> about my code rather than understanding the issue. What I'm trying to do is to
> >> make switching to my patchset as painless as possible, with a cleanup to remove
> >> redundant operations coming after the switchover.
> >
> >While the goal is fine, until we see a common pattern for what needs to
> >go into pcibios_add_device() I think we should have an arm64-specific
> >implementation (and probably an arm32 specific one as well). I can see
> >powerpc uses it for setting the DMA ops. Would we have a similar need on
> >arm64 to choose between coherent and non-coherent dma_ops?
> 
> Liviu,
> 
> I have the same feeling with Catalin. An arm64-specific implementation of
> pcibios_add_device() would be better.
> 
> No more other concerns from my side.

OK, I will make the change when returning from my holiday at the beginning of September,
when I plan to send v10.

Best regards,
Liviu

> 
> >
> >Also at some point we'll get ACPI support, so I'm not sure what we do
> >with assigning the dev->irq here but definitely of_* functions won't
> >work.
> >
> >-- 
> >Catalin
> 
> -- 
> Richard Yang
> Help you, Help me
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

-- 
-------------------
   .oooO
   (   )
    \ (  Oooo.
     \_) (   )
          ) /
         (_/

 One small step
   for me ...

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/