[SERIAL] 2.6 ACPI serial discovery
Patch from: Bjorn Helgaas This patch tweaks the 8250 ACPI namespace discovery to 1) add support for UARTs in IO port space 2) add support for non-extended IRQs 3) use acpi_walk_resources() to simplify processing the _CRS data, and 4) add error checking (ioremap failure, lack of MMIO address in _CRS). 5) uses KERN_ERR, KERN_WARNING, etc 6) complains if register_serial() fails (i.e., if UART_NR is too small) This is one step towards eliminating blind probing for devices on ia64. ACPI is supposed to tell us where legacy devices are; why not use that information?
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