irqchip/realtek-rtl: Fix off-by-one in routing
There is an offset between routing values (1..6) and the connected MIPS CPU interrupts (2..7), but no distinction was made between these two values. This issue was previously hidden during testing, because an interrupt mapping was used where for each required interrupt another (unused) routing was configured, with an offset of +1. Offset the CPU IRQ numbers by -1 to retrieve the correct routing value. Fixes: 9f3a0f34 ("irqchip: Add support for Realtek RTL838x/RTL839x interrupt controller") Signed-off-by:Sander Vanheule <sander@svanheule.net> Signed-off-by:
Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/177b920aa8d8610615692d0e657e509f363c85ca.1641739718.git.sander@svanheule.net
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