Commit ceeafb8e authored Apr 04, 2016 by Andy Shevchenko Committed by Greg Kroah-Hartman Apr 30, 2016

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>

parent 1fc969c7

drivers/tty/serial/8250/8250_mid.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -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;