sparc64: restore irq in error paths in iommu
There are some error paths where we should restore IRQs but we don't. Fixes: bb620c3d ("sparc: Make sparc64 use scalable lib/iommu-common.c functions") Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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