linux-kernel - Re: [PATCH v3] PCI: Only enable IO window if supported

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:	Thu, 6 Aug 2015 08:58:40 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: Re: [PATCH v3] PCI: Only enable IO window if supported

On Wed, Aug 5, 2015 at 9:50 PM, Guenter Roeck <linux@...ck-us.net> wrote:
> If I understand you correctly, we might need to change the code
> in pci_read_bridge_io() as follows.
>
> From
>
>         if (!(child->bus_flags & PCI_BUS_FLAGS_SUPPORTS_IO))
>                 return;
>
> to something like
>
>         if (!(child->bus_flags & PCI_BUS_FLAGS_SUPPORTS_IO)) {
>                 if (dev->transparent)
>                         return;
>                 child->bus_flags |= PCI_BUS_FLAGS_SUPPORTS_IO;
>         }
>
Then how about: the root bus really does not support IO PORT resource.
--
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/