[PATCH 3/8] PCI/VPD: Add VPD release quirk for Amazon Annapurna Labs host bridge

[Jonathan Chocron]

The Amazon Annapurna Labs pcie host bridge 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@xxxxxxxxxx>
---
 drivers/pci/vpd.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 4963c2e2bd4c..b594b2895ffe 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -644,4 +644,16 @@ 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 "Annapurna Labs pcie quirk - Releasing VPD capability (No support for VPD read/write transactions)\n");
+	}
+}
+
+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