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| author | Thomas Gleixner <tglx@linutronix.de> | 2011-02-07 10:34:30 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-02-19 12:58:09 +0100 |
| commit | fe200ae48ef5c79bf7941fe8046ff9505c570ff6 (patch) | |
| tree | 767d2cf011437a266a655ce2ec39360cb85f7f28 /kernel/irq/internals.h | |
| parent | d05c65fff0ef672be75429266751f0e015b54d94 (diff) | |
| download | linux-fe200ae48ef5c79bf7941fe8046ff9505c570ff6.tar.gz linux-fe200ae48ef5c79bf7941fe8046ff9505c570ff6.tar.bz2 linux-fe200ae48ef5c79bf7941fe8046ff9505c570ff6.zip | |
genirq: Mark polled irqs and defer the real handler
With the chip.end() function gone we might run into a situation where
a poll call runs and the real interrupt comes in, sees IRQ_INPROGRESS
and disables the line. That might be a perfect working one, which will
then be masked forever.
So mark them polled while the poll runs. When the real handler sees
IRQ_INPROGRESS it checks the poll flag and waits for the polling to
complete. Add the necessary amount of sanity checks to it to avoid
deadlocks.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq/internals.h')
| -rw-r--r-- | kernel/irq/internals.h | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index b5bfa24aa6a6..0eff7e92b1a9 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -28,6 +28,7 @@ extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); /* Resending of interrupts :*/ void check_irq_resend(struct irq_desc *desc, unsigned int irq); +bool irq_wait_for_poll(struct irq_desc *desc); #ifdef CONFIG_PROC_FS extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); @@ -47,16 +48,6 @@ extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); extern void irq_set_thread_affinity(struct irq_desc *desc); -#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED -static inline void irq_end(unsigned int irq, struct irq_desc *desc) -{ - if (desc->irq_data.chip && desc->irq_data.chip->end) - desc->irq_data.chip->end(irq); -} -#else -static inline void irq_end(unsigned int irq, struct irq_desc *desc) { } -#endif - /* Inline functions for support of irq chips on slow busses */ static inline void chip_bus_lock(struct irq_desc *desc) { |