MIPS: IP32: Fix hang on shutdown in power button interrupt handler.

The hang was caused by the use of disable_irq() from the interrupt handler
itself.  Fixed by the use of disable_irq_nosync().  The issue was
triggered by:

    commit 3aa551c9b4c40018f0e261a178e3d25478dc04a9
    Author: Thomas Gleixner <tglx@linutronix.de>
    Date:   Mon Mar 23 18:28:15 2009 +0100

        genirq: add threaded interrupt handler support

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/sgi-ip32/ip32-reset.c b/arch/mips/sgi-ip32/ip32-reset.c
index b6cab08..667da93 100644 (file)
--- a/arch/mips/sgi-ip32/ip32-reset.c
+++ b/arch/mips/sgi-ip32/ip32-reset.c
@@ -145,7 +145,7 @@ static irqreturn_t ip32_rtc_int(int irq, void *dev_id)
                        "%s: RTC IRQ without RTC_IRQF\n", __func__);
        }
        /* Wait until interrupt goes away */
-       disable_irq(MACEISA_RTC_IRQ);
+       disable_irq_nosync(MACEISA_RTC_IRQ);
        init_timer(&debounce_timer);
        debounce_timer.function = debounce;
        debounce_timer.expires = jiffies + 50;