From: Roland Dreier <rdreier@cisco.com>
To: Manu Abraham <abraham.manu@gmail.com>
Cc: Greg KH <greg@kroah.com>,
linux-pci@atrey.karlin.mff.cuni.cz,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: PCIE
Date: Thu, 24 May 2007 20:25:58 -0700 [thread overview]
Message-ID: <ada1wh560u1.fsf@cisco.com> (raw)
In-Reply-To: <46561287.8020103@gmail.com> (Manu Abraham's message of "Fri, 25 May 2007 02:32:39 +0400")
> I am now wondering whether the usage of MSI would help in this case and
> that i should be using enable_msi before request_irq ?
MSI interrupts are never shared. So if pci_enable_msi() succeeds, you
can be sure that the interrupts you get with that IRQ number are
coming from your device.
But using MSI does not work on all systems, so your driver needs to
work with standard (possibly shared) INTx interrupts too. And you
should probably provide at least a module flag to disable the use of
MSI, to avoid problems on buggy systems.
- R.
next prev parent reply other threads:[~2007-05-25 3:26 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-23 12:15 PCIE Manu Abraham
2007-05-23 15:59 ` PCIE Greg KH
2007-05-23 20:59 ` PCIE Manu Abraham
2007-05-23 21:10 ` PCIE Roland Dreier
2007-05-23 22:11 ` PCIE Manu Abraham
2007-05-23 22:23 ` PCIE Roland Dreier
2007-05-23 23:03 ` PCIE Manu Abraham
2007-05-23 23:51 ` PCIE Roland Dreier
2007-05-24 0:07 ` PCIE Manu Abraham
2007-05-24 22:32 ` PCIE Manu Abraham
2007-05-25 3:25 ` Roland Dreier [this message]
2007-05-26 15:03 ` PCIE Manu Abraham
2007-05-26 18:28 ` PCIE Grant Grundler
2007-05-26 19:27 ` PCIE Manu Abraham
2007-05-28 1:15 ` PCIE Roland Dreier
2007-05-28 1:25 ` PCIE Manu Abraham
2007-05-28 2:04 ` PCIE Manu Abraham
2007-05-28 2:24 ` PCIE Roland Dreier
2007-05-28 2:47 ` PCIE Manu Abraham
2007-05-26 22:49 ` PCIE David Miller
2007-05-26 22:57 ` PCIE Manu Abraham
2007-05-26 23:55 ` PCIE Grant Grundler
2007-05-27 0:00 ` PCIE David Miller
2007-05-27 0:16 ` PCIE Grant Grundler
2007-05-27 0:30 ` PCIE David Miller
2007-05-27 1:01 ` PCIE Manu Abraham
2007-05-27 1:49 ` PCIE Grant Grundler
2007-05-27 20:28 ` PCIE Manu Abraham
2007-05-28 1:10 ` PCIE Roland Dreier
2007-05-27 2:34 ` PCIE H. Peter Anvin
2007-05-27 7:40 ` PCIE David Miller
2007-05-27 20:31 ` PCIE Manu Abraham
2007-05-28 1:05 ` PCIE Roland Dreier
2007-05-28 1:03 ` PCIE Roland Dreier
2007-05-28 2:54 ` PCIE David Miller
2007-05-28 4:18 ` PCIE Grant Grundler
2007-05-28 5:23 ` PCIE H. Peter Anvin
2007-05-28 5:22 ` PCIE H. Peter Anvin
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