4.9-stable review patch. If anyone has any objections, please let me know.
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From: Christophe Leroy christophe.leroy@c-s.fr
[ 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: 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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/sysdev/mpc8xx_pic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/sysdev/mpc8xx_pic.c +++ b/arch/powerpc/sysdev/mpc8xx_pic.c @@ -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);