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3c33066a21
Having a function to check if the iommu table has any allocation helps deciding if a tbl can be reset for using a new DMA window. It should be enough to replace all instances of !bitmap_empty(tbl...). iommu_table_in_use() skips reserved memory, so we don't need to worry about releasing it before testing. This causes iommu_table_release_pages() to become unnecessary, given it is only used to remove reserved memory for testing. Also, only allow storing reserved memory values in tbl if they are valid in the table, so there is no need to check it in the new helper. Signed-off-by: Leonardo Bras <leobras.c@gmail.com> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210817063929.38701-3-leobras.c@gmail.com |
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