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| author | Thomas Gleixner <tglx@linutronix.de> | 2006-07-01 22:30:08 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-07-01 22:30:08 +0100 |
| commit | f8b5473fcbddbfde827ecf82aa0e81fa2a878220 (patch) | |
| tree | 0d6d504f95830610cb2c2fb1e6e9e1ebf932762b /kernel/irq/chip.c | |
| parent | a2166abd06e7a9fd34eb18b7b27da18c6146e6ef (diff) | |
| download | linux-f8b5473fcbddbfde827ecf82aa0e81fa2a878220.tar.gz linux-f8b5473fcbddbfde827ecf82aa0e81fa2a878220.tar.bz2 linux-f8b5473fcbddbfde827ecf82aa0e81fa2a878220.zip | |
[ARM] 3690/1: genirq: Introduce and make use of dummy irq chip
Patch from Thomas Gleixner
From: Thomas Gleixner <tglx@linutronix.de>
ARM has a couple of really dumb interrupt controllers.
Implement a generic one and fixup the ARM migration. ARM reused
the no_irq_chip for this purpose, but this does not work out
for platforms which are not converted to the new interrupt
type handling model.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'kernel/irq/chip.c')
| -rw-r--r-- | kernel/irq/chip.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 4a0952d9458b..54105bdfe20d 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -462,9 +462,18 @@ __set_irq_handler(unsigned int irq, if (!handle) handle = handle_bad_irq; - if (is_chained && desc->chip == &no_irq_chip) - printk(KERN_WARNING "Trying to install " - "chained interrupt type for IRQ%d\n", irq); + if (desc->chip == &no_irq_chip) { + printk(KERN_WARNING "Trying to install %sinterrupt handler " + "for IRQ%d\n", is_chained ? "chained " : " ", irq); + /* + * Some ARM implementations install a handler for really dumb + * interrupt hardware without setting an irq_chip. This worked + * with the ARM no_irq_chip but the check in setup_irq would + * prevent us to setup the interrupt at all. Switch it to + * dummy_irq_chip for easy transition. + */ + desc->chip = &dummy_irq_chip; + } spin_lock_irqsave(&desc->lock, flags); |