net/mlx5e: Replace async events spinlock with synchronize_irq()
We only need to flush the irq handler to make sure it does not queue a work into the global work queue after we start to flush it. So using synchronize_irq() is more appropriate than a spin lock. Signed-off-by: NTariq Toukan <tariqt@mellanox.com> Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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