diff options
Diffstat (limited to 'drivers/pci/access.c')
| -rw-r--r-- | drivers/pci/access.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index c70e3113df7a..1c8051003e67 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -893,12 +893,20 @@ EXPORT_SYMBOL(pcie_capability_clear_and_set_dword); int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val) { + if (pci_dev_is_disconnected(dev)) { + *val = ~0; + return -ENODEV; + } return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_read_config_byte); int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val) { + if (pci_dev_is_disconnected(dev)) { + *val = ~0; + return -ENODEV; + } return pci_bus_read_config_word(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_read_config_word); @@ -906,18 +914,26 @@ EXPORT_SYMBOL(pci_read_config_word); int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val) { + if (pci_dev_is_disconnected(dev)) { + *val = ~0; + return -ENODEV; + } return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_read_config_dword); int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val) { + if (pci_dev_is_disconnected(dev)) + return -ENODEV; return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_write_config_byte); int pci_write_config_word(const struct pci_dev *dev, int where, u16 val) { + if (pci_dev_is_disconnected(dev)) + return -ENODEV; return pci_bus_write_config_word(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_write_config_word); @@ -925,6 +941,8 @@ EXPORT_SYMBOL(pci_write_config_word); int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val) { + if (pci_dev_is_disconnected(dev)) + return -ENODEV; return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val); } EXPORT_SYMBOL(pci_write_config_dword); |