ACK: [SRU][o/n/j:linux-azure][PATCH 0/1] Fix race of mana_hwc_post_rx_wqe and new hwc response

[Aaron Jauregui]

On Thu, Aug 29, 2024 at 03:58:27PM -0300, Vinicius Peixoto wrote:
> BugLink: https://bugs.launchpad.net/bugs/2078001
> 
> [Impact]
> 
> Microsoft has requested us to backport the following bugfix, currently in the netdev tree:
> 
> 8af174ea863c net: mana: Fix race of mana_hwc_post_rx_wqe and new hwc response
> https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=8af174ea863c72f25ce31cee3baad8a301c0cf0f
> 
> [Fix]
> 
> Clean cherry-pick from the netdev tree to the {oracular,noble,jammy}:linux-azure trees.
> 
> [Test plan]
> 
> Build and boot tested.
> 
> [Where problems could occur]
> 
> This seems to have a low risk of regression, since it's just making sure to finish posting an RX workqueue event before waiting for completion in order to avoid a race condition with the hardware. However, any regressions here would likely impact users as MANA-related errors/timeouts.
> 
> [Other info]
> 
> SF #00393766
> 
> Haiyang Zhang (1):
>   net: mana: Fix race of mana_hwc_post_rx_wqe and new hwc response
> 
>  .../net/ethernet/microsoft/mana/hw_channel.c  | 62 ++++++++++---------
>  1 file changed, 34 insertions(+), 28 deletions(-)

Acked-by: Aaron Jauregui <aaron.jauregui at canonical.com>