On Wed, Aug 27, 2014 at 01:23:01PM -0700, Greg KH wrote:
> On Wed, Aug 27, 2014 at 02:57:57PM +0200, Ricardo Ribalda Delgado wrote:
> > There is a missmatch between the way file2alias generates the modalias
> > and the way the pci driver generates it.
> >
> > Some implementations of modprobe will fail to load the driver for a pci
> > device automatically when the pci interface is defined on the driver. As
> > one will be in uppercase and the other in lowercase.
> >
> > Fortunatelly not many drivers define this.
> >
> > Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
> > ---
> > drivers/pci/pci-sysfs.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
> > index 9ff0a90..76ef791 100644
> > --- a/drivers/pci/pci-sysfs.c
> > +++ b/drivers/pci/pci-sysfs.c
> > @@ -177,7 +177,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
> > {
> > struct pci_dev *pci_dev = to_pci_dev(dev);
> >
> > - return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
> > + return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X\n",
> > pci_dev->vendor, pci_dev->device,
> > pci_dev->subsystem_vendor, pci_dev->subsystem_device,
> > (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
>
> As said in the other thread about this issue, no, this code has been
> here for over 9 years just fine. Please fix your userspace code that is
> trying to compare hex values as a string and not a numeric value, that
> is the stuff that is wrong, not the kernel.
Oh wait, I see what you are worried about now, the mis-match for just
the upper bits of the class value.
Yeah, that's a bug, sorry about that, a 9+ year old one, nice catch :)
Bjorn, feel free to apply this, sorry for the earlier objection. Also
please mark it for stable tree inclusion so this gets backported
properly.
thanks,
greg k-h
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