From: Valmiki <valmikibow@gmail.com>
To: linux-pci@vger.kernel.org
Subject: What is meant by chained interrupt handlers, when to use them.
Date: Sun, 20 Dec 2015 10:30:35 +0000 (UTC) [thread overview]
Message-ID: <loom.20151220T112828-725@post.gmane.org> (raw)
I'm seeing that chained_irq_enter/exit functions are being used in cained
irq handlers.
These chained_irq_enter/exit functions are doing ack, mask, unmask
functions from irq chip.
Already when an interrupt handler is being executed that IRQ line will be
disabled by linux, so what is the purpose of masking/unmasking them.
What is term chained referring to, does it mean reading interrupt status
register and check for bit set one after and another handle that
corresponding IRQ, so in a chain fashion.
Valmiki
next reply other threads:[~2015-12-20 10:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-20 10:30 Valmiki [this message]
2015-12-21 2:47 ` What is meant by chained interrupt handlers, when to use them Valmiki
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