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authorThomas Gleixner <tglx@linutronix.de>2011-02-07 10:34:30 +0100
committerThomas Gleixner <tglx@linutronix.de>2011-02-19 12:58:09 +0100
commitfe200ae48ef5c79bf7941fe8046ff9505c570ff6 (patch)
tree767d2cf011437a266a655ce2ec39360cb85f7f28 /kernel/irq/internals.h
parentd05c65fff0ef672be75429266751f0e015b54d94 (diff)
downloadop-kernel-dev-fe200ae48ef5c79bf7941fe8046ff9505c570ff6.zip
op-kernel-dev-fe200ae48ef5c79bf7941fe8046ff9505c570ff6.tar.gz
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.h11
1 files changed, 1 insertions, 10 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index b5bfa24..0eff7e9 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)
{
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