iommu/iova: Free global iova rcache on iova alloc failure
When ever an iova alloc request fails we free the iova ranges present in the percpu iova rcaches and then retry but the global iova rcache is not freed as a result we could still see iova alloc failure even after retry as global rcache is holding the iova's which can cause fragmentation. So, free the global iova rcache as well and then go for the retry. Signed-off-by:Vijayanand Jitta <vjitta@codeaurora.org> Reviewed-by:
Robin Murphy <robin.murphy@arm.com> Acked-by:
John Garry <john.garry@huaqwei.com> Link: https://lore.kernel.org/r/1601451864-5956-2-git-send-email-vjitta@codeaurora.org Signed-off-by:
Will Deacon <will@kernel.org>
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