In arch/i386/kernel/acpi/boot.c, platform GSI does not propagate back from
mp_register_gsi() to a calling routine which results in IRQ to be set for
wrong GSI.  This causes most of the PCI slots on the first PCI module to
fail.  This patch fixes the problem by returning new GSI back to
acpi_register_gsi().
Signed-off-by: Natalie Protasevich <Natalie.Protasevich@unisys.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>