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[MIPS] IP32: Fix unexpected irq 71 

It's possible that the crime interrupt handler is called without
pending interrupts (probably a hardware issue). To avoid irritating
"unexpected irq 71" messages, we now just ignore the spurious crime
interrupts.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Thomas Bogendoerfer 2008-06-24 00:48:05 +02:00 committed by Ralf Baechle
parent c461a97311
commit 1faf7f25b2
1 changed files with 5 additions and 0 deletions
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arch/mips/sgi-ip32/ip32-irq.c
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@ -425,6 +425,11 @@ static void ip32_irq0(void)
BUILD_BUG_ON(MACEISA_SERIAL2_RDMAOR_IRQ - MACEISA_AUDIO_SW_IRQ != 31);
crime_int = crime->istat & crime_mask;
/* crime sometime delivers spurious interrupts, ignore them */
if (unlikely(crime_int == 0))
return;
irq = MACE_VID_IN1_IRQ + __ffs(crime_int);
if (crime_int & CRIME_MACEISA_INT_MASK) {