diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-05-18 12:48:00 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-05-18 14:59:08 +0200 |
| commit | fe12bc2c996d3e492b2920e32ac79f7bbae3e15d (patch) | |
| tree | 05af87563123d909d04c328aead3fe24599633d1 /kernel | |
| parent | fe0514348452f5b0ad7e842b0d71b8322b1297de (diff) | |
genirq: Uninline and sanity check generic_handle_irq()
generic_handle_irq() is missing a NULL pointer check for the result of
irq_to_desc. This was a not a big problem, but we want to expose it to
drivers, so we better have sanity checks in place. Add a return value
as well, which indicates that the irq number was valid and the handler
was invoked.
Based on the pure code move from Jonathan Cameron.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/irqdesc.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index e07b975fdc5..9f65b0225d6 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -290,6 +290,21 @@ static int irq_expand_nr_irqs(unsigned int nr) #endif /* !CONFIG_SPARSE_IRQ */ +/** + * generic_handle_irq - Invoke the handler for a particular irq + * @irq: The irq number to handle + * + */ +int generic_handle_irq(unsigned int irq) +{ + struct irq_desc *desc = irq_to_desc(irq); + + if (!desc) + return -EINVAL; + generic_handle_irq_desc(irq, desc); + return 0; +} + /* Dynamic interrupt handling */ /** |