net/mlx5: fs, retry insertion to hash table on EBUSY

net/mlx5: fs, retry insertion to hash table on EBUSY

When inserting into an rhashtable faster than it can grow, an -EBUSY error
may be encountered. Modify the insertion logic to retry on -EBUSY until
either a successful insertion or a genuine error is returned.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://patch.msgid.link/20241219175841.1094544-6-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>