ACK: [PATCH 0/1][SRU][J][K][L] Intel E810 NICs hang on boot when bonds are configured

[Tim Gardner]

On 3/23/23 12:20 PM, Heitor Alves de Siqueira wrote:
> BugLink: https://bugs.launchpad.net/bugs/2004262
> 
> [Impact]
>    * Intel E810-family NICs cause system hangs when booting with bonding enabled
>    * This happens due to the driver unplugging auxiliary devices
>    * The unplug event happens under RTNL lock context, which causes a deadlock
>      where the RDMA driver waits for the RNL lock to complete removal
> 
> [Test Plan]
>    * Users have reported that after setting up bonding on switch and server
>      side, the system will hang when starting network services
> 
> [Fix]
>    * The upstream patch defers unplugging/re-plugging of the auxiliary device,
>      so that it's not performed under the RTNL lock context.
>    * Fix was introduced by commit:
>        248401cb2c46 ice: avoid bonding causing auxiliary plug/unplug under RTNL lock
> 
> [Regression Potential]
>    * Regressions would manifest in devices that support RDMA functionality and
>      have been added to a bond
>    * We should look out for auxiliary devices that haven't been properly
>      unplugged, or that cause further issues with
>      ice_plug_aux_dev()/ice_unplug_aux_dev()
> 
> Dave Ertman (1):
>    ice: avoid bonding causing auxiliary plug/unplug under RTNL lock
> 
>   drivers/net/ethernet/intel/ice/ice.h      | 14 +++++---------
>   drivers/net/ethernet/intel/ice/ice_main.c | 19 ++++++++-----------
>   2 files changed, 13 insertions(+), 20 deletions(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
-- 
-----------
Tim Gardner
Canonical, Inc