Merge branch 'net-mlx5-fixes-for-socket-direct'

Tariq Toukan says:

====================
net/mlx5: Fixes for Socket-Direct

This series fixes several race conditions and bugs in the mlx5
Socket-Direct (SD) single netdev flow.

Patch 1 serializes mlx5_sd_init()/mlx5_sd_cleanup() with
mlx5_devcom_comp_lock() and tracks the SD group state on the primary
device, preventing concurrent or duplicate bring-up/tear-down.

Patch 2 fixes the debugfs "multi-pf" directory being stored on the
calling device's sd struct instead of the primary's, which caused
memory leaks and recreation errors when cleanup ran from a different PF.

Patch 3 fixes a race where a secondary PF could access the primary's
auxiliary device after it had been unbound, by holding the primary's
device lock while operating on its auxiliary device.

Patch 4 fixes missing cleanup on ETH probe errors. The analogous gap on
the resume path requires introducing sd_suspend/resume APIs that only
destroy FW resources and is left for a follow-up series.
====================

Link: https://patch.msgid.link/20260504180206.268568-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>