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:	Fri, 11 Oct 2013 10:21:35 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [BUG] WARN_ON(!context) in drivers/pci/hotplug/acpiphp_glue.c

On Fri, Oct 11, 2013 at 4:13 AM, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> +/**
> + * slot_should_be_exposed - Check whether or not to expose a slot to userland.
> + * @bridge: ACPIPHP bridge the slot belongs to.
> + * @handle: ACPI handle of a device in the slot.
> + */
> +static inline bool slot_should_be_exposed(struct acpiphp_bridge *bridge,
> +                                         acpi_handle handle)

Thanks, that looks much better.

I do worry that we now seem to add the slot to all the acpiphp lists
even if it is managed by pciehp. That gets rid of the warning Steven
saw (because now it always has that context), but I'm left wondering
how much pcihp and aciphp will fight over the slot.

Yes, the acpiphp_register_hotplug_slot() doesn't get called, but we
still do register_hotplug_dock_device(), for example. How does that
interact with pcihp that thinks it owns the slot?

Or am I misreading the code? It's more readable, and no longer makes
me homicidal, but I don't actually know the code itself.

             Linus
--
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/

Powered by blists - more mailing lists