Merge branch 'bugzilla-11715' into test

1 files changed, 52 insertions, 3 deletions

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 733c4f8d42ea..3ce029ffaa55 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -95,7 +95,8 @@ static void __init nvidia_bugs(int num, int slot, int func)
 
 }
 
-static u32 ati_ixp4x0_rev(int num, int slot, int func)
+#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
+static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
 {
         u32 d;
         u8  b;
@@ -115,7 +116,6 @@ static u32 ati_ixp4x0_rev(int num, int slot, int func)
 
 static void __init ati_bugs(int num, int slot, int func)
 {
-#if defined(CONFIG_ACPI) && defined (CONFIG_X86_IO_APIC)
         u32 d;
         u8  b;
 
@@ -138,9 +138,56 @@ static void __init ati_bugs(int num, int slot, int func)
                 printk(KERN_INFO "If you got timer trouble "
                        "try acpi_use_timer_override\n");
         }
-#endif
 }
 
+static u32 __init ati_sbx00_rev(int num, int slot, int func)
+{
+        u32 old, 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;
+}
+
+static void __init ati_bugs_contd(int num, int slot, int func)
+{
+        u32 d, rev;
+
+        if (acpi_use_timer_override)
+                return;
+
+        rev = ati_sbx00_rev(num, slot, func);
+        if (rev > 0x13)
+                return;
+
+        /* check for IRQ0 interrupt swap */
+        d = read_pci_config(num, slot, func, 0x64);
+        if (!(d & (1<<14)))
+                acpi_skip_timer_override = 1;
+
+        if (acpi_skip_timer_override) {
+                printk(KERN_INFO "SB600 revision 0x%x\n", rev);
+                printk(KERN_INFO "Ignoring ACPI timer override.\n");
+                printk(KERN_INFO "If you got timer trouble "
+                       "try acpi_use_timer_override\n");
+        }
+}
+#else
+static void __init ati_bugs(int num, int slot, int func)
+{
+}
+
+static void __init ati_bugs_contd(int num, int slot, int func)
+{
+}
+#endif
+
 #ifdef CONFIG_DMAR
 static void __init intel_g33_dmar(int num, int slot, int func)
 {
@@ -176,6 +223,8 @@ static struct chipset early_qrk[] __initdata = {
           PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
           PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
+        { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
+          PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
 #ifdef CONFIG_DMAR
         { PCI_VENDOR_ID_INTEL, 0x29c0,
           PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar },