linux-kernel - RE: [Intel-wired-lan] [PATCH 1/2] igb: Teardown SR-IOV before unregister

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] [day] [month] [year] [list]

Message-ID: <309B89C4C689E141A5FF6A0C5FB2118B81AE35B1@ORSMSX101.amr.corp.intel.com>
Date:	Tue, 11 Aug 2015 02:11:57 +0000
From:	"Brown, Aaron F" <aaron.f.brown@...el.com>
To:	Alex Williamson <alex.williamson@...hat.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH 1/2] igb: Teardown SR-IOV before
	unregister_netdev()

> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...ts.osuosl.org] On
> Behalf Of Alex Williamson
> Sent: Monday, July 27, 2015 4:19 PM
> To: intel-wired-lan@...ts.osuosl.org; Kirsher, Jeffrey T
> Cc: netdev@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [Intel-wired-lan] [PATCH 1/2] igb: Teardown SR-IOV before
> unregister_netdev()
> 
> When the .remove() callback for a PF is called, SR-IOV support for the
> device is disabled, which requires unbinding and removing the VFs.
> The VFs may be in-use either by the host kernel or userspace, such as
> assigned to a VM through vfio-pci.  In this latter case, the VFs may
> be removed either by shutting down the VM or hot-unplugging the
> devices from the VM.  Unfortunately in the case of a Windows 2012 R2
> guest, hot-unplug is broken due to the ordering of the PF driver
> teardown.  Disabling SR-IOV prior to unregister_netdev() avoids this
> issue.
> 
> Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
> ---
>  drivers/net/ethernet/intel/igb/igb_main.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

Tested-by: Aaron Brown <aaron.f.brown@...el.com>
--
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/