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

PATCH Applied Christophe Leroy 2 participants 2 messages Mar 10, 2017 – Jun 5, 2017 PowerPC

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Christophe Leroy

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PATCH 1/1 powerpc/8xx: fix mpc8xx_get_irq() return on no irq

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 <[email protected]>
---
 arch/powerpc/sysdev/mpc8xx_pic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
arch/powerpc/sysdev/mpc8xx_pic.c +1 -1
index 3e828b20c21e..2842f9d63d21 100644
@@ -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);
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