x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F

Martin reported that the Supermicro X8DTH-i/6/iF/6F advertises incorrect
host bridge windows via _CRS:

  pci_root PNP0A08:00: host bridge window [io  0xf000-0xffff]
  pci_root PNP0A08:01: host bridge window [io  0xf000-0xffff]

Both bridges advertise the 0xf000-0xffff window, which cannot be correct.

Work around this by ignoring _CRS on this system.  The downside is that we
may not assign resources correctly to hot-added PCI devices (if they are
possible on this system).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=42606
Reported-by: Martin Burnicki <martin.burnicki@meinberg.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org

path: root/vlan.h

#ifndef VLAN_H
#define VLAN_H

#include <stdbool.h>
#include <inttypes.h>

static inline uint16_t vlan_tci2prio(uint16_t tci)
{
	return (tci & 0xe000) >> 13;
}

static inline uint16_t vlan_tci2cfi(uint16_t tci)
{
	return (tci & 0x1000) >> 12;
}

static inline uint16_t vlan_tci2vid(uint16_t tci)
{
	return tci & 0x0fff;
}

#endif