| Message ID | 20190718094531.21423-4-jonnyc@amazon.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | Amazon's Annapurna Labs DT-based PCIe host controller driver | expand |
On Thu, Jul 18, 2019 at 10:45:26, Jonathan Chocron <jonnyc@amazon.com> wrote: > The Amazon Annapurna Labs PCIe Root Port exposes the VPD capability, > but there is no actual support for it. > > The reason for not using the already existing quirk_blacklist_vpd() > is that, although this fails pci_vpd_read/write, the 'vpd' sysfs > entry still exists. When running lspci -vv, for example, this > results in the following error: > > pcilib: sysfs_read_vpd: read failed: Input/output error > > This quirk removes the sysfs entry, which avoids the error print. > > Signed-off-by: Jonathan Chocron <jonnyc@amazon.com> > --- > drivers/pci/vpd.c | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c > index 4963c2e2bd4c..c23a8ec08db9 100644 > --- a/drivers/pci/vpd.c > +++ b/drivers/pci/vpd.c > @@ -644,4 +644,20 @@ static void quirk_chelsio_extend_vpd(struct pci_dev *dev) > DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID, > quirk_chelsio_extend_vpd); > > +static void quirk_al_vpd_release(struct pci_dev *dev) > +{ > + if (dev->vpd) { > + pci_vpd_release(dev); > + dev->vpd = NULL; > + pci_warn(dev, FW_BUG "Releasing VPD capability (No support for VPD read/write transactions)\n"); > + } > +} > + > +/* > + * The 0031 device id is reused for other non Root Port device types, > + * therefore the quirk is registered for the PCI_CLASS_BRIDGE_PCI class. > + */ > +DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, > + PCI_CLASS_BRIDGE_PCI, 8, quirk_al_vpd_release); > + > #endif > -- > 2.17.1 Seems ok. Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c index 4963c2e2bd4c..c23a8ec08db9 100644 --- a/drivers/pci/vpd.c +++ b/drivers/pci/vpd.c @@ -644,4 +644,20 @@ static void quirk_chelsio_extend_vpd(struct pci_dev *dev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID, quirk_chelsio_extend_vpd); +static void quirk_al_vpd_release(struct pci_dev *dev) +{ + if (dev->vpd) { + pci_vpd_release(dev); + dev->vpd = NULL; + pci_warn(dev, FW_BUG "Releasing VPD capability (No support for VPD read/write transactions)\n"); + } +} + +/* + * The 0031 device id is reused for other non Root Port device types, + * therefore the quirk is registered for the PCI_CLASS_BRIDGE_PCI class. + */ +DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, + PCI_CLASS_BRIDGE_PCI, 8, quirk_al_vpd_release); + #endif
The Amazon Annapurna Labs PCIe Root Port exposes the VPD capability, but there is no actual support for it. The reason for not using the already existing quirk_blacklist_vpd() is that, although this fails pci_vpd_read/write, the 'vpd' sysfs entry still exists. When running lspci -vv, for example, this results in the following error: pcilib: sysfs_read_vpd: read failed: Input/output error This quirk removes the sysfs entry, which avoids the error print. Signed-off-by: Jonathan Chocron <jonnyc@amazon.com> --- drivers/pci/vpd.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)