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| author | Jiang Liu <jiang.liu@huawei.com> | 2012-06-22 14:55:20 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-22 15:17:31 -0600 |
| commit | 574a59414083df3911e5a1514742959b412b6947 (patch) | |
| tree | f56675a895305ff300e3fa7046da42fd8f4d5419 | |
| parent | 8503562fd4e8e261bd7ca442705c6e8f0fd88228 (diff) | |
| download | linux-574a59414083df3911e5a1514742959b412b6947.tar.bz2 | |
x86/PCI: refine __pci_mmcfg_init() for better code readability
Refine __pci_mmcfg_init() for better code readability.
Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jiang Liu <liuj97@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | arch/x86/pci/mmconfig-shared.c | 46 |
1 files changed, 21 insertions, 25 deletions
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c index 332fabdeff43..ffe72b9d6869 100644 --- a/arch/x86/pci/mmconfig-shared.c +++ b/arch/x86/pci/mmconfig-shared.c @@ -544,8 +544,6 @@ static void __init pci_mmcfg_reject_broken(int early) } } -static int __initdata known_bridge; - static int __init acpi_mcfg_check_entry(struct acpi_table_mcfg *mcfg, struct acpi_mcfg_allocation *cfg) { @@ -617,28 +615,7 @@ static int __init pci_parse_mcfg(struct acpi_table_header *header) static void __init __pci_mmcfg_init(int early) { - /* MMCONFIG disabled */ - if ((pci_probe & PCI_PROBE_MMCONF) == 0) - return; - - /* MMCONFIG already enabled */ - if (!early && !(pci_probe & PCI_PROBE_MASK & ~PCI_PROBE_MMCONF)) - return; - - /* for late to exit */ - if (known_bridge) - return; - - if (early) { - if (pci_mmcfg_check_hostbridge()) - known_bridge = 1; - } - - if (!known_bridge) - acpi_sfi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg); - pci_mmcfg_reject_broken(early); - if (list_empty(&pci_mmcfg_list)) return; @@ -660,14 +637,33 @@ static void __init __pci_mmcfg_init(int early) } } +static int __initdata known_bridge; + void __init pci_mmcfg_early_init(void) { - __pci_mmcfg_init(1); + if (pci_probe & PCI_PROBE_MMCONF) { + if (pci_mmcfg_check_hostbridge()) + known_bridge = 1; + else + acpi_sfi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg); + __pci_mmcfg_init(1); + } } void __init pci_mmcfg_late_init(void) { - __pci_mmcfg_init(0); + /* MMCONFIG disabled */ + if ((pci_probe & PCI_PROBE_MMCONF) == 0) + return; + + if (known_bridge) + return; + + /* MMCONFIG hasn't been enabled yet, try again */ + if (pci_probe & PCI_PROBE_MASK & ~PCI_PROBE_MMCONF) { + acpi_sfi_table_parse(ACPI_SIG_MCFG, pci_parse_mcfg); + __pci_mmcfg_init(0); + } } static int __init pci_mmcfg_late_insert_resources(void) |