[PATCH 6/6] PCI/VPD: Treat invalid VPD like no VPD capability

[Heiner Kallweit <hkallweit1@gmail.com>]

Exporting sysfs files that can't be accessed doesn't make much sense.
Therefore, if either a quirk or the dynamic size calculation result
in VPD being marked as invalid, treat this like device has no VPD
capability. One consequence is that vpd sysfs file is not visible.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/pci/vpd.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 9187ba496..58a3aa6a4 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -125,9 +125,6 @@ static ssize_t pci_vpd_read(struct pci_dev *dev, loff_t pos, size_t count,
 	if (pos < 0)
 		return -EINVAL;
 
-	if (vpd->len == PCI_VPD_SZ_INVALID)
-		return -EIO;
-
 	if (pos > vpd->len)
 		return 0;
 
@@ -189,9 +186,6 @@ static ssize_t pci_vpd_write(struct pci_dev *dev, loff_t pos, size_t count,
 	if (pos < 0 || (pos & 3) || (count & 3))
 		return -EINVAL;
 
-	if (vpd->len == PCI_VPD_SZ_INVALID)
-		return -EIO;
-
 	if (end > vpd->len)
 		return -EINVAL;
 
@@ -232,6 +226,9 @@ void pci_vpd_init(struct pci_dev *dev)
 
 	if (!dev->vpd.len)
 		dev->vpd.len = pci_vpd_size(dev);
+
+	if (dev->vpd.len == PCI_VPD_SZ_INVALID)
+		dev->vpd.cap = 0;
 }
 
 static ssize_t vpd_read(struct file *filp, struct kobject *kobj,
-- 
2.32.0