tree 767d2cf011437a266a655ce2ec39360cb85f7f28
parent d05c65fff0ef672be75429266751f0e015b54d94
author Thomas Gleixner <tglx@linutronix.de> 1297071270 +0100
committer Thomas Gleixner <tglx@linutronix.de> 1298116689 +0100

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>