Re: FAILED: patch "[PATCH] net/mlx5e: Use preactivate hook to set the indirection table" failed to apply to 5.6-stable tree

[Sasha Levin <sashal@kernel.org>]

On Sat, Apr 18, 2020 at 12:12:10PM +0200, gregkh@linuxfoundation.org wrote:
>
>The patch below does not apply to the 5.6-stable tree.
>If someone wants it applied there, or to any other stable or longterm
>tree, then please email the backport, including the original git commit
>id to <stable@vger.kernel.org>.
>
>thanks,
>
>greg k-h
>
>------------------ original commit in Linus's tree ------------------
>
>From fe867cac9e1967c553e4ac2aece5fc8675258010 Mon Sep 17 00:00:00 2001
>From: Maxim Mikityanskiy <maximmi@mellanox.com>
>Date: Mon, 4 Nov 2019 12:02:14 +0200
>Subject: [PATCH] net/mlx5e: Use preactivate hook to set the indirection table
>
>mlx5e_ethtool_set_channels updates the indirection table before
>switching to the new channels. If the switch fails, the indirection
>table is new, but the channels are old, which is wrong. Fix it by using
>the preactivate hook of mlx5e_safe_switch_channels to update the
>indirection table at the stage when nothing can fail anymore.
>
>As the code that updates the indirection table is now encapsulated into
>a new function, use that function in the attach flow when the driver has
>to reduce the number of channels, and prepare the code for the next
>commit.
>
>Fixes: 85082dba0a ("net/mlx5e: Correctly handle RSS indirection table when changing number of channels")
>Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
>Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
>Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

I've grabbed these two dependencies for 5.6, 5.5, 5.4:

dca147b3dce5 ("net/mlx5e: Rename hw_modify to preactivate")
c2c95271f9f3 ("net/mlx5e: Encapsulate updating netdev queues into a function")

Older branches were more complex and still need a backport.

-- 
Thanks,
Sasha