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

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[ 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>
This commit is contained in:
Christophe Leroy 2017-03-10 11:37:01 +01:00 committed by Greg Kroah-Hartman
parent 80c9698bd6
commit 31462de6ba
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/sysdev/mpc8xx_pic.c
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@ -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);