diff options
author | Andi Kleen <ak@suse.de> | 2006-09-26 04:52:41 -0400 |
---|---|---|
committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 04:52:41 -0400 |
commit | 0637a70a5db98182d9ad3d6ae1ee30acf20afde9 (patch) | |
tree | 36b625e24f3fe11a97cd9926ca2be6b2df1cbf89 /arch/i386/kernel/acpi | |
parent | 8f60774a116ced9b73ae3913d511687889efe725 (diff) |
[PATCH] x86: Allow disabling early pci scans with pci=noearly or disallowing conf1
Some buggy systems can machine check when config space accesses
happen for some non existent devices. i386/x86-64 do some early
device scans that might trigger this. Allow pci=noearly to disable
this. Also when type 1 is disabling also don't do any early
accesses which are always type1.
This moves the pci= configuration parsing to be a early parameter.
I don't think this can break anything because it only changes
a single global that is only used by PCI.
Cc: gregkh@suse.de
Cc: Trammell Hudson <hudson@osresearch.net>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/i386/kernel/acpi')
-rw-r--r-- | arch/i386/kernel/acpi/earlyquirk.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c index 1649a175a206..fe799b11ac0a 100644 --- a/arch/i386/kernel/acpi/earlyquirk.c +++ b/arch/i386/kernel/acpi/earlyquirk.c | |||
@@ -48,7 +48,11 @@ void __init check_acpi_pci(void) | |||
48 | int num, slot, func; | 48 | int num, slot, func; |
49 | 49 | ||
50 | /* Assume the machine supports type 1. If not it will | 50 | /* Assume the machine supports type 1. If not it will |
51 | always read ffffffff and should not have any side effect. */ | 51 | always read ffffffff and should not have any side effect. |
52 | Actually a few buggy systems can machine check. Allow the user | ||
53 | to disable it by command line option at least -AK */ | ||
54 | if (!early_pci_allowed()) | ||
55 | return; | ||
52 | 56 | ||
53 | /* Poor man's PCI discovery */ | 57 | /* Poor man's PCI discovery */ |
54 | for (num = 0; num < 32; num++) { | 58 | for (num = 0; num < 32; num++) { |