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| 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 | |
| parent | fe0514348452f5b0ad7e842b0d71b8322b1297de (diff) | |
| download | linux-stable-fe12bc2c996d3e492b2920e32ac79f7bbae3e15d.tar.gz linux-stable-fe12bc2c996d3e492b2920e32ac79f7bbae3e15d.tar.bz2 linux-stable-fe12bc2c996d3e492b2920e32ac79f7bbae3e15d.zip | |
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>
| -rw-r--r-- | include/linux/irqdesc.h | 5 | ||||
| -rw-r--r-- | kernel/irq/irqdesc.c | 15 |
2 files changed, 16 insertions, 4 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index c70b1aa4b93a..2d921b35212c 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -111,10 +111,7 @@ static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *de desc->handle_irq(irq, desc); } -static inline void generic_handle_irq(unsigned int irq) -{ - generic_handle_irq_desc(irq, irq_to_desc(irq)); -} +int generic_handle_irq(unsigned int irq); /* Test to see if a driver has successfully requested an irq */ static inline int irq_has_action(unsigned int irq) diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index e07b975fdc5a..9f65b0225d6a 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 */ /** |