net/mlx5: Unmap only the relevant IO memory mapping
When freeing UAR the driver tries to unmap uar->map and uar->bf_map which are mutually exclusive thus always unmapping a NULL pointer. Make sure we only call iounmap() once, for the actual mapping. Fixes: 0ba42241 ('net/mlx5: Fix global UAR mapping') Signed-off-by: NGal Pressman <galp@mellanox.com> Reported-by: NDoron Tsur <doront@mellanox.com> Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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