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mpc85xx: disable the i8259 irq on mpc8548cds (but leave the controller initialized) - it shares an irq with the pcie device which causes irq storms

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25037 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2011-01-18 14:43:44 +00:00
parent f9887a55d2
commit 561ec2935a
2 changed files with 36 additions and 0 deletions
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23
target/linux/mpc85xx/patches/120-mpc8548_cds_i8259_noirq_init.patch Normal file
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@@ -0,0 +1,23 @@
--- a/arch/powerpc/platforms/85xx/mpc85xx_cds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
@@ -234,15 +234,16 @@ static int mpc85xx_cds_8259_attach(void)
return -ENODEV;
}
+ i8259_init(cascade_node, 0);
+ of_node_put(cascade_node);
+
cascade_irq = irq_of_parse_and_map(cascade_node, 0);
if (cascade_irq == NO_IRQ) {
- printk(KERN_ERR "Failed to map cascade interrupt\n");
+ of_node_put(cascade_node);
+ printk(KERN_DEBUG "No interrupt for i8259 PIC\n");
return -ENXIO;
}
- i8259_init(cascade_node, 0);
- of_node_put(cascade_node);
-
/*
* Hook the interrupt to make sure desc->action is never NULL.
* This is required to ensure that the interrupt does not get