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Date:	Tue, 23 Sep 2008 17:43:23 +0200
From:	Jan-Bernd Themann <>
To:	Sebastien Dugue <>
Cc:	Christoph Raisch <>,
	Benjamin Herrenschmidt <>,, Jan-Bernd Themann <>,,
	linux-kernel <>,
	Linux-rt <>,
	linux-ppc <>,,
	Thomas Q Klein <>,,
	Hoang-Nam Nguyen <>
Subject: Re: [PATCH HACK] powerpc: quick hack to get a functional eHEA with hardirq preemption, eHCA is close


I think these are the "functional" changes that need to be included in
the ibmebus driver. We'll add a RT flag in the final version to enable
these changes only for RT-Linux for now. 
Ben, can you / your team look into the implementation
of the set_irq_type functionality needed for XICS?

Jan-Bernd & Christoph

diff -Nurp b/arch/powerpc/kernel/ibmebus.c a/arch/powerpc/kernel/ibmebus.c
--- b/arch/powerpc/kernel/ibmebus.c	2008-09-22 00:29:55.000000000 +0200
+++ a/arch/powerpc/kernel/ibmebus.c	2008-09-23 12:04:53.000000000 +0200
@@ -216,12 +216,16 @@ int ibmebus_request_irq(u32 ist, irq_han
 			unsigned long irq_flags, const char *devname,
 			void *dev_id)
+	int ret;
 	unsigned int irq = irq_create_mapping(NULL, ist);
 	if (irq == NO_IRQ)
 		return -EINVAL;
-	return request_irq(irq, handler, irq_flags, devname, dev_id);
+	ret = request_irq(irq, handler, irq_flags, devname, dev_id);
+	set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
+	return ret;

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