linux-kernel - test for "spurious" IRQ ignores possible IRQ_WAKE

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Date:	Mon, 14 Sep 2009 16:30:33 -0400 (EDT)
From:	"Robert P. J. Day" <rpjday@...shcourse.ca>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: test for "spurious" IRQ ignores possible IRQ_WAKE_THREAD value


  never ashamed to embarrass myself in public, i just noticed the
following.  from kernel/irq/spurious.c:

...
static void
__report_bad_irq(unsigned int irq, struct irq_desc *desc,
                 irqreturn_t action_ret)
{
        struct irqaction *action;

        if (action_ret != IRQ_HANDLED && action_ret != IRQ_NONE) {
                printk(KERN_ERR "irq event %d: bogus return value %x\n",
                                irq, action_ret);

  but from include/linux/irqreturn.h, we see *three* possible return
values:

enum irqreturn {
        IRQ_NONE,
        IRQ_HANDLED,
        IRQ_WAKE_THREAD,
};

typedef enum irqreturn irqreturn_t;
#define IRQ_RETVAL(x)   ((x) != IRQ_NONE)

  is there an inconsistency here?

rday
--

========================================================================
Robert P. J. Day                               Waterloo, Ontario, CANADA

        Linux Consulting, Training and Annoying Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Twitter:                                       http://twitter.com/rpjday
========================================================================
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