linux-kernel - Re: [PATCH] pciehp: Handle interrupts that happen during initialization.

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 18 Feb 2009 00:47:10 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pciehp:  Handle interrupts that happen during initialization.

Kenji Kaneshige <kaneshige.kenji@...fujitsu.com> writes:

> In the current pciehp implementation, minimum resources enough to
> enable devices under the bridge are assigned when P2P bridge is
> hot-added. My concern is that enough resources are NOT assigned to
> the bridge if an additional slot is empty. As a result, hot-add
> adapter card on the additional slot won't work because of resource
> shortage.

It is a good concern.  Right now I know I won't need a bus number
but you are quite right the mmio and iospace may be a problem.

My preliminary test case doesn't cover that so I will look and
confirm it is a problem I need to address.

>> kobject_name is not initialized, and slot_name(p_slot) calls
>> hoptlug_slot_name which calls pci_slot_name which kobj_name. 
>> It looks like this problem was introduced in commit 
>> e1acb24f059defdaa0264e925f19cc21b0a3e592
>
> Thank your for the information. I understood what is happening.
> This needs to be fixed. But, as I mentioned before, I think
> software notification mechanism should be initialized before
> sysfs entries are created. I'll consider alternative fix.

Reasonable.  I haven't had the need nor gotten brave enough to
support those sysfs entries in my minimal driver.

Eric
--
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/