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2c79171be6
Init them to defaults. Make CONFIG_CNTL 8 bytes so unaligned read/write is easier. Write changes to CONFIG_CNTL even if offset + size is > 4. Log aperture change only if first byte (LSB) of CONFIG_CNTL is written. The driver might only write to the 2 most significant bytes which won't affect aperture size. Offset and size are applied to the destination, not to source value, so we shouldn't use extract_bits when logging value. Use ATI bitfield enums in switch statement.