linux-kernel - [PATCH 07/14] x86_64 irq: In __DO_ACTION perform the FINAL action for every entry.

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Message-ID: <m1ejohung7.fsf_-_@ebiederm.dsl.xmission.com>
Date:	Fri, 23 Feb 2007 04:23:52 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org,
	Zwane Mwaikambo <zwane@...radead.org>,
	Ashok Raj <ashok.raj@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"Lu, Yinghai" <yinghai.lu@....com>,
	Natalie Protasevich <protasnb@...il.com>,
	Andi Kleen <ak@...e.de>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 07/14] x86_64 irq: In __DO_ACTION perform the FINAL action for every entry.


If we have an irq that comes from multiple io_apic pins the FINAL action
(which is io_apic_sync or nothing) needs to be called for every entry or
else if the two pins come from different io_apics we may not wait until
after the action happens on the io_apic.

Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
---
 arch/x86_64/kernel/io_apic.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 74671de..52fc19b 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -149,11 +149,11 @@ static inline void io_apic_sync(unsigned int apic)
 		reg = io_apic_read(entry->apic, 0x10 + R + pin*2);	\
 		reg ACTION;						\
 		io_apic_modify(entry->apic, reg);			\
+		FINAL;							\
 		if (!entry->next)					\
 			break;						\
 		entry = irq_2_pin + entry->next;			\
 	}								\
-	FINAL;								\
 }
 
 union entry_union {
-- 
1.5.0.g53756

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