[PATCH] PCI/VPD: Treat tag 0xff as indicator for missing VPD EPROM

[Heiner Kallweit <hkallweit1@xxxxxxxxx>]

First tag being read as 0xff indicates a missing VPD EPROM, same as 0x00.
The latter case we handle properly already, so let's handle 0x00 here too.

Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
---
 drivers/pci/vpd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 26bf7c877..6a32d938d 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -78,8 +78,8 @@ static size_t pci_vpd_size(struct pci_dev *dev, size_t old_size)
 	while (off < old_size && pci_read_vpd(dev, off, 1, header) == 1) {
 		unsigned char tag;
 
-		if (!header[0] && !off) {
-			pci_info(dev, "Invalid VPD tag 00, assume missing optional VPD EPROM\n");
+		if ((!header[0] || header[0] == 0xff) && !off) {
+			pci_info(dev, "Invalid VPD tag 00/FF, assume missing optional VPD EPROM\n");
 			return 0;
 		}
 
-- 
2.32.0