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pci: insert assert that auto-assigned-address function is single function device. 

Auto-assigned-address pci function (passing devfn = -1) is always
single function.
This patch adds assert() to guarantee that auto-assigned-address function
is always single function device at function = 0.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Isaku Yamahata 2010-06-23 16:15:26 +09:00 committed by Blue Swirl
parent 520128bde8
commit 6fa84913ec
2 changed files with 3 additions and 1 deletions
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3
hw/pci.c
View File

@ -227,6 +227,7 @@ void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
const char *name, int devfn_min)
{
qbus_create_inplace(&bus->qbus, &pci_bus_info, parent, name);
assert(PCI_FUNC(devfn_min) == 0);
bus->devfn_min = devfn_min;
/* host bridge */
@ -608,7 +609,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
{
if (devfn < 0) {
for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
devfn += 8) {
devfn += PCI_FUNC_MAX) {
if (!bus->devices[devfn])
goto found;
}

1
hw/pci.h
View File

@ -14,6 +14,7 @@
#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
#define PCI_FUNC(devfn) ((devfn) & 0x07)
#define PCI_FUNC_MAX 8
/* Class, Vendor and Device IDs from Linux's pci_ids.h */
#include "pci_ids.h"