diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-02-24 00:52:16 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-25 20:24:21 +0100 |
| commit | 9d591edd02a245305b1b9379e4c5571bad4d2774 (patch) | |
| tree | 1fdd608db6096afaf2696ff9878cb4b7096047f3 /kernel/irq | |
| parent | genirq: Prepare the handling of shared oneshot interrupts (diff) | |
| download | linux-9d591edd02a245305b1b9379e4c5571bad4d2774.tar.xz linux-9d591edd02a245305b1b9379e4c5571bad4d2774.zip | |
genirq: Allow shared oneshot interrupts
Support ONESHOT on shared interrupts, if all drivers agree on it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110223234956.483640430@linutronix.de>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/manage.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 2301de19ac7d..58c861367300 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -824,10 +824,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) rand_initialize_irq(irq); } - /* Oneshot interrupts are not allowed with shared */ - if ((new->flags & IRQF_ONESHOT) && (new->flags & IRQF_SHARED)) - return -EINVAL; - /* * Check whether the interrupt nests into another interrupt * thread. @@ -881,10 +877,12 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) * Can't share interrupts unless both agree to and are * the same type (level, edge, polarity). So both flag * fields must have IRQF_SHARED set and the bits which - * set the trigger type must match. + * set the trigger type must match. Also all must + * agree on ONESHOT. */ if (!((old->flags & new->flags) & IRQF_SHARED) || - ((old->flags ^ new->flags) & IRQF_TRIGGER_MASK)) { + ((old->flags ^ new->flags) & IRQF_TRIGGER_MASK) || + ((old->flags ^ new->flags) & IRQF_ONESHOT)) { old_name = old->name; goto mismatch; } |