From: "Matvejchikov Ilya" <matvejchikov@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: Too many spurious interrupts on mpc82xx with linux-2.4.35.5
Date: Wed, 4 Jul 2007 09:51:09 +0400 [thread overview]
Message-ID: <8496f91a0707032251m6fea386cu2405899d2945fd07@mail.gmail.com> (raw)
Hi all!
If you still have this problem, try this patch. It helps :)
Signed-off-by : Matvejchikov Ilya <matvejchikov@gmail.com>
---
diff -purN linux-2.4.34.5-vanilla/arch/ppc/kernel/cpm2_pic.c
linux-2.4.34.5/arch/ppc/kernel/cpm2_pic.c
--- linux-2.4.34.5-vanilla/arch/ppc/kernel/cpm2_pic.c 2007-06-06
23:20:53.000000000 +0400
+++ linux-2.4.34.5/arch/ppc/kernel/cpm2_pic.c 2007-06-28
12:17:42.000000000 +0400
@@ -79,6 +79,12 @@ static void cpm2_mask_and_ack(unsigned i
ppc_cached_irq_mask[word] &= ~(1 << (31 - bit));
simr[word] = ppc_cached_irq_mask[word];
sipnr[word] = 1 << (31 - bit);
+
+ /*
+ * Work around large numbers of spurious IRQs on PowerPC 82xx
+ * systems.
+ */
+ mb();
}
static void cpm2_end_irq(unsigned int irq_nr)
next reply other threads:[~2007-07-04 5:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-04 5:51 Matvejchikov Ilya [this message]
[not found] ` <4728C35B.7000709@chello.nl>
2007-10-31 19:49 ` Too many spurious interrupts on mpc82xx with linux-2.4.35.5 Matvejchikov Ilya
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