diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2016-04-04 17:35:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 19:26:55 +0300 |
| commit | ceeafb8e222f4ea73981ca0bf9f29882cb0c34b2 (patch) | |
| tree | 364596c836b754840fe25dc17d9fc864f4912a10 | |
| parent | 1fc969c759861ac491b6c93116aa497f774b00dc (diff) | |
| download | linux-ceeafb8e222f4ea73981ca0bf9f29882cb0c34b2.tar.xz | |
serial: 8250_mid: correct comment regarding Tangier HSU
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.
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_mid.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_mid.c b/drivers/tty/serial/8250/8250_mid.c index e8122375aa18..86379a79a6a3 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; |