| From foo@baz Mon Apr 9 17:09:24 CEST 2018 |
| From: Christophe Leroy <christophe.leroy@c-s.fr> |
| Date: Fri, 10 Mar 2017 11:37:01 +0100 |
| Subject: powerpc/8xx: fix mpc8xx_get_irq() return on no irq |
| |
| 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); |
| |
