diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-07-18 10:14:56 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-07-18 10:14:56 +0200 |
commit | 48ae74443403ab25876959e84785f61bf421ccef (patch) | |
tree | dd6d8277f2f0e691edf49a38ff9a804f9a1532d0 /arch/x86/kernel/early-quirks.c | |
parent | 1b82c9666a6f637ccb3a86d0fbe23d0427076815 (diff) | |
parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) |
Merge branch 'linus' into x86/step
Diffstat (limited to 'arch/x86/kernel/early-quirks.c')
-rw-r--r-- | arch/x86/kernel/early-quirks.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c index a4665f37cfc..a0e11c0cc87 100644 --- a/arch/x86/kernel/early-quirks.c +++ b/arch/x86/kernel/early-quirks.c @@ -120,7 +120,18 @@ static struct chipset early_qrk[] __initdata = { {} }; -static void __init check_dev_quirk(int num, int slot, int func) +/** + * check_dev_quirk - apply early quirks to a given PCI device + * @num: bus number + * @slot: slot number + * @func: PCI function + * + * Check the vendor & device ID against the early quirks table. + * + * If the device is single function, let early_quirks() know so we don't + * poke at this device again. + */ +static int __init check_dev_quirk(int num, int slot, int func) { u16 class; u16 vendor; @@ -131,7 +142,7 @@ static void __init check_dev_quirk(int num, int slot, int func) class = read_pci_config_16(num, slot, func, PCI_CLASS_DEVICE); if (class == 0xffff) - return; + return -1; /* no class, treat as single function */ vendor = read_pci_config_16(num, slot, func, PCI_VENDOR_ID); @@ -154,7 +165,9 @@ static void __init check_dev_quirk(int num, int slot, int func) type = read_pci_config_byte(num, slot, func, PCI_HEADER_TYPE); if (!(type & 0x80)) - return; + return -1; + + return 0; } void __init early_quirks(void) @@ -167,6 +180,9 @@ void __init early_quirks(void) /* Poor man's PCI discovery */ for (num = 0; num < 32; num++) for (slot = 0; slot < 32; slot++) - for (func = 0; func < 8; func++) - check_dev_quirk(num, slot, func); + for (func = 0; func < 8; func++) { + /* Only probe function 0 on single fn devices */ + if (check_dev_quirk(num, slot, func)) + break; + } } |