diff options
Diffstat (limited to 'arch/i386/pci')
| -rw-r--r-- | arch/i386/pci/mmconfig-shared.c | 12 | ||||
| -rw-r--r-- | arch/i386/pci/mmconfig.c | 6 | ||||
| -rw-r--r-- | arch/i386/pci/pci.h | 2 |
3 files changed, 15 insertions, 5 deletions
diff --git a/arch/i386/pci/mmconfig-shared.c b/arch/i386/pci/mmconfig-shared.c index 4ea0852..473db62 100644 --- a/arch/i386/pci/mmconfig-shared.c +++ b/arch/i386/pci/mmconfig-shared.c @@ -43,12 +43,14 @@ static void __init unreachable_devices(void) if (val1 == 0xffffffff) continue; - raw_pci_ops->read(0, bus, devfn, 0, 4, &val2); - if (val1 != val2) { - set_bit(i + 32 * bus, pci_mmcfg_fallback_slots); - printk(KERN_NOTICE "PCI: No mmconfig possible" - " on device %02x:%02x\n", bus, i); + if (pci_mmcfg_arch_reachable(0, bus, devfn)) { + raw_pci_ops->read(0, bus, devfn, 0, 4, &val2); + if (val1 == val2) + continue; } + set_bit(i + 32 * bus, pci_mmcfg_fallback_slots); + printk(KERN_NOTICE "PCI: No mmconfig possible on device" + " %02x:%02x\n", bus, i); } } } diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c index 11be089..bb1afd9 100644 --- a/arch/i386/pci/mmconfig.c +++ b/arch/i386/pci/mmconfig.c @@ -136,6 +136,12 @@ static struct pci_raw_ops pci_mmcfg = { .write = pci_mmcfg_write, }; +int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus, + unsigned int devfn) +{ + return get_base_addr(seg, bus, devfn) != 0; +} + int __init pci_mmcfg_arch_init(void) { printk(KERN_INFO "PCI: Using MMCONFIG\n"); diff --git a/arch/i386/pci/pci.h b/arch/i386/pci/pci.h index 2ce3d44..e58bae2 100644 --- a/arch/i386/pci/pci.h +++ b/arch/i386/pci/pci.h @@ -101,4 +101,6 @@ extern void pcibios_sort(void); #define PCI_MMCFG_MAX_CHECK_BUS 16 extern DECLARE_BITMAP(pci_mmcfg_fallback_slots, 32*PCI_MMCFG_MAX_CHECK_BUS); +extern int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus, + unsigned int devfn); extern int __init pci_mmcfg_arch_init(void); |
