[PATCH v2] Erroneous double irq_eoi() on CPM IRQ in MPC8xx

[Christophe Leroy]

irq_eoi() is already called by generic_handle_irq() so 
it shall not be called a again

Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Index: linux/arch/powerpc/platforms/8xx/m8xx_setup.c
===================================================================
--- linux/arch/powerpc/platforms/8xx/m8xx_setup.c	(revision 4802)
+++ linux/arch/powerpc/platforms/8xx/m8xx_setup.c	(working copy)
@@ -218,19 +218,12 @@
 
 static void cpm_cascade(unsigned int irq, struct irq_desc *desc)
 {
-	struct irq_chip *chip;
-	int cascade_irq;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int cascade_irq = cpm_get_irq();
 
-	if ((cascade_irq = cpm_get_irq()) >= 0) {
-		struct irq_desc *cdesc = irq_to_desc(cascade_irq);
-
+	if (cascade_irq >= 0)
 		generic_handle_irq(cascade_irq);
 
-		chip = irq_desc_get_chip(cdesc);
-		chip->irq_eoi(&cdesc->irq_data);
-	}
-
-	chip = irq_desc_get_chip(desc);
 	chip->irq_eoi(&desc->irq_data);
 }