On Tuesday, August 03, 2010, Hidetoshi Seto wrote:
> (2010/08/03 6:54), Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rjw@xxxxxxx>
> >
> > Introduce a function allowing the caller to check if PCIe AER should
> > be enabled.
> >
> > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
> > ---
> (snip)
> > Index: linux-2.6/drivers/pci/pcie/aer/aerdrv.c
> > ===================================================================
> > --- linux-2.6.orig/drivers/pci/pcie/aer/aerdrv.c
> > +++ linux-2.6/drivers/pci/pcie/aer/aerdrv.c
> > @@ -72,6 +72,11 @@ void pci_no_aer(void)
> > pcie_aer_disable = 1; /* has priority over 'forceload' */
> > }
> >
> > +bool pci_aer_available(void)
> > +{
> > + return !pcie_aer_disable && pci_msi_enabled();
> > +}
> > +
> > static int set_device_error_reporting(struct pci_dev *dev, void *data)
> > {
> > bool enable = *((bool *)data);
> > @@ -411,9 +416,7 @@ static void aer_error_resume(struct pci_
> > */
> > static int __init aer_service_init(void)
> > {
> > - if (pcie_aer_disable)
> > - return -ENXIO;
> > - if (!pci_msi_enabled())
> > + if (pci_aer_available())
> > return -ENXIO;
> > return pcie_port_service_register(&aerdriver);
> > }
>
> Breaking a big lump into small pieces often makes things clear.
> You should return error when AER is _NOT_ available.
>
> if (!pci_aer_available())
> return -ENXIO;
>
> Be careful...
Yup, sorry.
Thanks,
Rafael
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