diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2021-04-01 15:03:49 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-04-30 22:38:31 +0300 |
| commit | d1df5f3f4cfff88c989cbeec6ca0e02340494818 (patch) | |
| tree | f861fca4040045db1fa293b301351d783028ae9b /drivers/pci | |
| parent | 384d0c68204a4a657f4bbc096c50d729ae7d9ef0 (diff) | |
| download | linux-d1df5f3f4cfff88c989cbeec6ca0e02340494818.tar.xz | |
PCI/VPD: Make missing VPD message less alarming
Realtek RTL8169/8168/8125 NIC families indicate VPD capability and an
optional VPD EEPROM can be connected via I2C/SPI. However I haven't seen
any card or system with such a VPD EEPROM yet. The missing EEPROM causes
the following warning whenever e.g. lscpi -vv is executed.
invalid short VPD tag 00 at offset 01
The warning confuses users, and I think we should handle the situation more
gently. Therefore, if first VPD byte is read as 0x00, assume a missing
optional VPD PROM and replace the warning with a more descriptive message
at info level.
[bhelgaas: fix pre-existing whitespace]
Link: https://lore.kernel.org/r/ccbc11f1-4dbb-e2c8-d0ea-559e06d4c340@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/vpd.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c index a1d31c5d1864..cbf784ed5216 100644 --- a/drivers/pci/vpd.c +++ b/drivers/pci/vpd.c @@ -71,10 +71,14 @@ static size_t pci_vpd_size(struct pci_dev *dev, size_t old_size) size_t off = 0; unsigned char header[1+2]; /* 1 byte tag, 2 bytes length */ - while (off < old_size && - pci_read_vpd(dev, off, 1, header) == 1) { + 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"); + return 0; + } + if (header[0] & PCI_VPD_LRDT) { /* Large Resource Data Type Tag */ tag = pci_vpd_lrdt_tag(header); |