[Intel-wired-lan] [next PATCH S26 05/12] i40e: allocate memory safer

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Deepthi Kavalur
> Sent: Monday, January 04, 2016 10:33 AM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [next PATCH S26 05/12] i40e: allocate memory
> safer
> 
> From: Jesse Brandeburg <jesse.brandeburg at intel.com>
> 
> The sync_vsi_filter function was allocating memory in such a way that it could
> sleep (GFP_KERNEL) which was causing a problem when called by the team
> driver under rcu_read_lock(), which cannot be held while sleeping.  Found
> with lockdep.
> 
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg at intel.com>
> Change-ID: I4e59053cb5eedcf3d0ca151715be3dc42a94bdd5
> ---
> Testing-Hints:
> Run lockdep enabled kernel and try these steps:
>   teamd -t team0 -rd -c '{"runner":{"name":"activebackup"}}'
>   teamdctl team0 port add ens3f0
>   teamdctl team0 port add ens3f0
>   teamdctl team0 port add ens3f1
>   ip link set team0 up
>   ip link add link team0 name team0.3 type vlan id 3
>   ip l set team0.3 up
>   ip link del team0.3
> 
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>
Patch code changes correctly applied, no lock errors reported with lock validator