diff options
| -rw-r--r-- | drivers/serial/8250_pci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c index fd76542c597..e3140e5b16c 100644 --- a/drivers/serial/8250_pci.c +++ b/drivers/serial/8250_pci.c @@ -1652,6 +1652,10 @@ static struct pciserial_board pci_boards[] __devinitdata = { }, }; +static const struct pci_device_id softmodem_blacklist[] = { + { PCI_VDEVICE ( AL, 0x5457 ), }, /* ALi Corporation M5457 AC'97 Modem */ +}; + /* * Given a complete unknown PCI device, try to use some heuristics to * guess what the configuration might be, based on the pitiful PCI @@ -1660,6 +1664,7 @@ static struct pciserial_board pci_boards[] __devinitdata = { static int __devinit serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) { + const struct pci_device_id *blacklist; int num_iomem, num_port, first_port = -1, i; /* @@ -1674,6 +1679,18 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) (dev->class & 0xff) > 6) return -ENODEV; + /* + * Do not access blacklisted devices that are known not to + * feature serial ports. + */ + for (blacklist = softmodem_blacklist; + blacklist < softmodem_blacklist + ARRAY_SIZE(softmodem_blacklist); + blacklist++) { + if (dev->vendor == blacklist->vendor && + dev->device == blacklist->device) + return -ENODEV; + } + num_iomem = num_port = 0; for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) { if (pci_resource_flags(dev, i) & IORESOURCE_IO) { |