diff options
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 22c9b27fdd8d..56098b3e17c0 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3284,31 +3284,34 @@ static int pci_set_vga_state_arch(struct pci_dev *dev, bool decode, * @dev: the PCI device * @decode: true = enable decoding, false = disable decoding * @command_bits: PCI_COMMAND_IO and/or PCI_COMMAND_MEMORY - * @change_bridge: traverse ancestors and change bridges + * @change_bridge_flags: traverse ancestors and change bridges + * CHANGE_BRIDGE_ONLY / CHANGE_BRIDGE */ int pci_set_vga_state(struct pci_dev *dev, bool decode, - unsigned int command_bits, bool change_bridge) + unsigned int command_bits, u32 flags) { struct pci_bus *bus; struct pci_dev *bridge; u16 cmd; int rc; - WARN_ON(command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY)); + WARN_ON((flags & PCI_VGA_STATE_CHANGE_DECODES) & (command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY))); /* ARCH specific VGA enables */ - rc = pci_set_vga_state_arch(dev, decode, command_bits, change_bridge); + rc = pci_set_vga_state_arch(dev, decode, command_bits, flags); if (rc) return rc; - pci_read_config_word(dev, PCI_COMMAND, &cmd); - if (decode == true) - cmd |= command_bits; - else - cmd &= ~command_bits; - pci_write_config_word(dev, PCI_COMMAND, cmd); + if (flags & PCI_VGA_STATE_CHANGE_DECODES) { + pci_read_config_word(dev, PCI_COMMAND, &cmd); + if (decode == true) + cmd |= command_bits; + else + cmd &= ~command_bits; + pci_write_config_word(dev, PCI_COMMAND, cmd); + } - if (change_bridge == false) + if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE)) return 0; bus = dev->bus; |