linux-kernel - [PATCH] genirq: recommend irqfxup or irqpoll as needed

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Message-Id: <1323144230-19427-1-git-send-email-edward.donovan@numble.net>
Date:	Mon,  5 Dec 2011 23:03:50 -0500
From:	Edward Donovan <edward.donovan@...ble.net>
To:	tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] genirq: recommend irqfxup or irqpoll as needed

Users with firmware irq problems are better off trying 'irqfixup'
before 'irqpoll'; make the error messages say this, like the docs
do.  And since we know which options the user booted with, and
whether they still have a problem, we won't suggest what they've
already tried.  If irqpoll has failed, then we have nothing else
to recommend: note that something may be buggy, somewhere.

For clarity's sake, I'd prefer to remove "nobody cared" entirely,
in favor of "not handled", but I wouldn't want to cut the tie to
archived discussions.  Not sure what's best.

Signed-off-by: Edward Donovan <edward.donovan@...ble.net>
---
 kernel/irq/spurious.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index dc813a9..3a1718b 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -194,9 +194,16 @@ __report_bad_irq(unsigned int irq, struct irq_desc *desc,
 	if (bad_action_ret(action_ret)) {
 		printk(KERN_ERR "irq event %d: bogus return value %x\n",
 				irq, action_ret);
+	} else if (irqfixup == 1) {
+		printk(KERN_ERR "irq %d not handled, even with \"irqfixup\": "
+				"try booting with the \"irqpoll\" option\n",
+				irq);
+	} else if (irqfixup == 2) {
+		printk(KERN_ERR "irq %d not handled, even with \"irqpoll\": "
+				"possible bug\n", irq);
 	} else {
-		printk(KERN_ERR "irq %d: nobody cared (try booting with "
-				"the \"irqpoll\" option)\n", irq);
+		printk(KERN_ERR "irq %d not handled (nobody cared): try booting"
+				" with the \"irqfixup\" option\n", irq);
 	}
 	dump_stack();
 	printk(KERN_ERR "handlers:\n");
-- 
1.7.5.4

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