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]
Message-ID: <20210705230212.GC142312@rocinante>
Date:   Tue, 6 Jul 2021 01:02:12 +0200
From:   Krzysztof Wilczyński <kw@...ux.com>
To:     Pali Rohár <pali@...nel.org>
Cc:     Aaron Ma <aaron.ma@...onical.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        davem@...emloft.net, kuba@...nel.org,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        Marek Behún <kabel@...nel.org>
Subject: Re: [PATCH 1/2] igc: don't rd/wr iomem when PCI is removed

Hi Pali,

[...]
> Aaron: can you check if pci_dev_is_disconnected() is really something
> which should be used and it helps you?

While having a closer look, I've noticed that quite a few of the network
drivers handle this somewhat, as I see that a lot of them have some sort
of I/O error handles set where a check for "pci_channel_io_perm_failure"
seem to be having place.  This is also true for this driver looking at
the igc_io_error_detected().

Is this not working for the igc driver?  Or is this for something
completely different?

Having said all that, I am not an expert in network drivers, so pardon
me if I am asking about something completely different, and I apologise
if that is the case.

> Bjorn, Krzysztof: what do you think about lifting helper function
> pci_dev_is_disconnected() to be available to all drivers and not only in
> PCI subsystem?

No objections from me, if we believe it's useful and that it might
encourage people to use a common API.  Currently, I can see at least
five potential users of this helper.

	Krzysztof

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ