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    SubjectRe: [-mm patch] aic7xxx: check irq validity (was Re: 2.6.18-mm2)
    On Sat, Sep 30, 2006 at 07:58:18PM -0400, Jeff Garzik wrote:
    > Frederik Deweerdt wrote:
    > >On Sat, Sep 30, 2006 at 12:43:24AM +0100, Alan Cox wrote:
    > >>Ar Gwe, 2006-09-29 am 23:50 +0000, ysgrifennodd Frederik Deweerdt:
    > >>>Does this patch makes sense in that case? If yes, I'll put up a patch
    > >>>for the remaining cases in the drivers/scsi/aic7xxx/ directory.
    > >>>Also, aic7xxx's coding style would put parenthesis around the returned
    > >>>value, should I follow it?
    > >>Yes - but perhaps with a warning message so users know why ?
    > >>
    > >>As to coding style - kernel style is unbracketed so I wouldnt worry
    > >>about either.
    > >>
    > >Thanks for the advices. The following patch checks whenever the irq is valid before issuing a
    > >request_irq() for AIC7XXX and AIC79XX. An error message is displayed to
    > >let the user know what went wrong.
    > >Regards,
    > >Frederik
    > >Signed-off-by: Frederik Deweerdt <>
    > Actually, rather than adding this check to every driver, I would rather do something like the attached patch: create a
    > pci_request_irq(), and pass a struct pci_device to it. Then the driver author doesn't have to worry about such details.
    That's better, indeed.
    > +#ifndef ARCH_VALIDATE_PCI_IRQ
    > +int pci_valid_irq(struct pci_dev *pdev)
    > +{
    > + if (pdev->irq == 0)
    > + return -EINVAL;
    Woulnd't this rather be ENODEV? Admitedly, from pci_valid_irq() (or
    is_irq_valid()) point of view, it _has_ been passed an invalid value. But
    from userspace's point of view, it's like the device was not present.

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      Last update: 2006-10-01 21:35    [W:0.022 / U:43.340 seconds]
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