linux-kernel - Re: [-mm patch] aic7xxx: check irq validity (was Re: 2.6.18-mm2)

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Date:	Mon, 02 Oct 2006 04:12:21 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Matthew Wilcox <matthew@....cx>
Cc:	linux-scsi@...r.kernel.org,
	"Linux-Kernel," <linux-kernel@...r.kernel.org>,
	"J.A. Magall??n" <jamagallon@....com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andrew Morton <akpm@...l.org>,
	Frederik Deweerdt <deweerdt@...e.fr>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: [-mm patch] aic7xxx: check irq validity (was Re: 2.6.18-mm2)


> Network drivers use their eth%d name.  USB drivers use [eu]hci_hcd:usb%d.
> Others tend to use the driver name.  Changing them all to be 0000:00:1d.2
> isn't really an improvement in the readability of /proc/interrupts, IMO.

hmm ok; how about allowing name to be NULL, and if it's NULL, use the
pci name?

> 
> So, current proposal:
> 
> int pci_request_irq(struct pci_dev *pdev, irq_handler_t handler,
> 			const char *name)
> {
> 	if (!valid_irq(pdev->irq)) {
> 		dev_printk(KERN_ERR, &pdev->dev, "invalid irq\n");
> 		return -EINVAL;
> 	}
> 
> 	return request_irq(pdev->irq, handler, IRQF_SHARED, name,
> 				pci_get_drvdata(pdev));
> }
> 
> But what about IRQF_SAMPLE_RANDOM?

that's a tough question. I'd almost suggest making such things
properties of the pdev, but sample-random is so far away from PCI
related that it makes no sense I suppose ;(

(others do I think)

One other interesting question is if this function can/should be used to
use MSI transparently (after pci_enable_msi() obviously)

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com

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