diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_mid.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_mid.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_mid.c b/drivers/tty/serial/8250/8250_mid.c index ed489880e..86379a79a 100644 --- a/drivers/tty/serial/8250/8250_mid.c +++ b/drivers/tty/serial/8250/8250_mid.c @@ -9,9 +9,10 @@ * published by the Free Software Foundation. */ -#include <linux/rational.h> +#include <linux/bitops.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/rational.h> #include <linux/dma/hsu.h> #include <linux/8250_pci.h> @@ -79,7 +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; |