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	The error check 'plic_off < 0' does nothing, since plic_off is stored as a u32. Fix this by changing it to an int, which matches the return type of fdt_node_offset_by_compatible(). Signed-off-by: Jacob Garber <jgarber1@ualberta.ca> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>