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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 /include/linux/irq.h
parentd05c65fff0ef672be75429266751f0e015b54d94 (diff)
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 'include/linux/irq.h')
-rw-r--r--include/linux/irq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index f5e900309d2..e32b64ccdc8 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -71,6 +71,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */
#define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */
#define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */
+#define IRQ_POLL_INPROGRESS 0x20000000 /* IRQ poll is in progress */
#define IRQF_MODIFY_MASK \
(IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \