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-rw-r--r--arch/x86/kernel/early-quirks.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 76b8cd953dee..3755ef494390 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -143,15 +143,10 @@ static void __init ati_bugs(int num, int slot, int func)
static u32 __init ati_sbx00_rev(int num, int slot, int func)
{
- u32 old, d;
+ u32 d;
- d = read_pci_config(num, slot, func, 0x70);
- old = d;
- d &= ~(1<<8);
- write_pci_config(num, slot, func, 0x70, d);
d = read_pci_config(num, slot, func, 0x8);
d &= 0xff;
- write_pci_config(num, slot, func, 0x70, old);
return d;
}
@@ -160,11 +155,19 @@ static void __init ati_bugs_contd(int num, int slot, int func)
{
u32 d, rev;
- if (acpi_use_timer_override)
+ rev = ati_sbx00_rev(num, slot, func);
+ if (rev >= 0x40)
+ acpi_fix_pin2_polarity = 1;
+
+ /*
+ * SB600: revisions 0x11, 0x12, 0x13, 0x14, ...
+ * SB700: revisions 0x39, 0x3a, ...
+ * SB800: revisions 0x40, 0x41, ...
+ */
+ if (rev >= 0x39)
return;
- rev = ati_sbx00_rev(num, slot, func);
- if (rev > 0x13)
+ if (acpi_use_timer_override)
return;
/* check for IRQ0 interrupt swap */