3c29b60388
IRQ 0 is a valid HW interrupt. So get_irq() shall return 0 when there is no irq, instead of returning irq_linear_revmap(... ,0) Fixes: f2a0bd3753dad ("[POWERPC] 8xx: powerpc port of core CPM PIC") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>