Commit 31462de6 authored Mar 10, 2017 by Christophe Leroy Committed by Greg Kroah-Hartman Apr 13, 2018

powerpc/8xx: fix mpc8xx_get_irq() return on no irq




[ Upstream commit 3c29b6038828c1f4c9ecbfec14d4fc5e25f1c947 ]

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: f2a0bd37 ("[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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 80c9698b

arch/powerpc/sysdev/mpc8xx_pic.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -79,7 +79,7 @@ unsigned int mpc8xx_get_irq(void)
		irq = in_be32(&siu_reg->sc_sivec) >> 26;

		if (irq == PIC_VEC_SPURRIOUS)
		irq = 0;
		return 0;

		return irq_linear_revmap(mpc8xx_pic_host, irq);