net: allwinner: emac: Add missing free_irq
If the mdio probe function fails in emac_open, the interrupt we just requested isn't freed. If emac_open is called again, for example because we try to set up the interface again, the kernel will oops because the interrupt wasn't properly released. Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com> Cc: <stable@vger.kernel.org> # 3.11+ Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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