On Intel Penwell and Tangier the HSU block (3 HSU ports) has a global register set which is currently not used by the driver. On Tangier it has it's own PCI device and thus available for enumeration. Since it's not a real HSU port we just skip it and therefore put a comment in the code why we do so. Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/tty/serial/8250/8250_mid.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250_mid.c b/drivers/tty/serial/8250/8250_mid.c index e812237..86379a7 100644 --- a/drivers/tty/serial/8250/8250_mid.c +++ b/drivers/tty/serial/8250/8250_mid.c @@ -80,7 +80,11 @@ static int tng_setup(struct mid8250 *mid, struct uart_port *p) struct pci_dev *pdev = to_pci_dev(p->dev); int index = PCI_FUNC(pdev->devfn); - /* Currently no support for HSU port0 */ + /* + * Device 0000:00:04.0 is not a real HSU port. It provides a global + * register set for all HSU ports, although it has the same PCI ID. + * Skip it here. + */ if (index-- == 0) return -ENODEV; -- 2.7.0 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
