[Intel-wired-lan] [next PATCH S11 03/15] i40e: stop VF rings

Bowers, AndrewX andrewx.bowers at intel.com
Tue Sep 8 18:16:40 UTC 2015

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Catherine Sullivan
> Sent: Wednesday, August 26, 2015 12:14 PM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [next PATCH S11 03/15] i40e: stop VF rings
> From: Mitch Williams <mitch.a.williams at intel.com>
> Explicitly stop the rings belonging to each VF when disabling SR-IOV.
> Even though the VFs were gone, and the associated VSIs were removed, the
> rings were not stopped, and in some circumstances the hardware would
> continue to access the memory formerly used by the rings, causing memory
> corruption or DMAR errors, both of which would lead to general malaise of
> the kernel.
> To relieve this condition, explicitly stop all the rings associated with each VF
> before releasing its resources.
> Signed-off-by: Mitch Williams <mitch.a.williams at intel.com>
> Change-ID: I78c05d562c66e7b594b7e48d67860f49b3e5b6ec
> ---
>  drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 5 +++++
>  1 file changed, 5 insertions(+)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>
Code changes present in tree, memory released when VFs are removed.

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