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| author | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2007-02-13 13:26:20 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-02-13 13:26:20 +0100 |
| commit | 56829d1982b6f1150553c049d372728b9eda5aec (patch) | |
| tree | 87f82f60df288579fe53dec2f45164b3636758b0 /arch/i386/pci | |
| parent | 429d512e532ec9c969aa6f66ddbc542f3a5fe4da (diff) | |
| download | talos-obmc-linux-56829d1982b6f1150553c049d372728b9eda5aec.tar.gz talos-obmc-linux-56829d1982b6f1150553c049d372728b9eda5aec.zip | |
[PATCH] mmconfig: fix unreachable_devices()
Currently, unreachable_devices() compares value of mmconfig and value
of conf1. But it doesn't check the device is reachable or not.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>
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 4ea0852487a4..473db6257013 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 11be089efd7d..bb1afd9e589d 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 2ce3d44b09d4..e58bae2076ad 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); |
