[PATCH] VIA IRQ quirk

Delete quirk_via_bridge(), restore quirk_via_irqpic() -- but now
improved to be invoked upon device ENABLE, and now only for VIA devices
-- not all devices behind VIA bridges.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 24 insertions, 16 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 026aa04669a2..afc9d29acd8a 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -18,6 +18,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/delay.h>
+#include <linux/acpi.h>
 #include "pci.h"
 
 /* Deal with broken BIOS'es that neglect to enable passive release,
@@ -467,9 +468,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_APIC,
  * non-x86 architectures (yes Via exists on PPC among other places),
  * we must mask the PCI_INTERRUPT_LINE value versus 0xf to get
  * interrupts delivered properly.
- *
- * TODO: When we have device-specific interrupt routers,
- * quirk_via_irqpic will go away from quirks.
  */
 
 /*
@@ -494,6 +492,29 @@ static void __devinit quirk_via_acpi(struct pci_dev *d)
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C586_3,     quirk_via_acpi );
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C686_4,     quirk_via_acpi );
 
+static void __devinit quirk_via_irqpic(struct pci_dev *dev)
+{
+        u8 irq, new_irq;
+
+#ifdef CONFIG_X86_IO_APIC
+        if (nr_ioapics && !skip_ioapic_setup)
+                return;
+#endif
+#ifdef CONFIG_ACPI
+        if (acpi_irq_model != ACPI_IRQ_MODEL_PIC)
+                return;
+#endif
+        new_irq = dev->irq & 0xf;
+        pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
+        if (new_irq != irq) {
+                printk(KERN_INFO "PCI: Via PIC IRQ fixup for %s, from %d to %d\n",
+                        pci_name(dev), irq, new_irq);
+                udelay(15);     /* unknown if delay really needed */
+                pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
+        }
+}
+DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_irqpic);
+
 /*
  * PIIX3 USB: We have to disable USB interrupts that are
  * hardwired to PIRQD# and may be shared with an
@@ -683,19 +704,6 @@ static void __init quirk_disable_pxb(struct pci_dev *pdev)
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82454NX,    quirk_disable_pxb );
 
-/*
- *      VIA northbridges care about PCI_INTERRUPT_LINE
- */
-int via_interrupt_line_quirk;
-
-static void __devinit quirk_via_bridge(struct pci_dev *pdev)
-{
-        if(pdev->devfn == 0) {
-                printk(KERN_INFO "PCI: Via IRQ fixup\n");
-                via_interrupt_line_quirk = 1;
-        }
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,     PCI_ANY_ID,                     quirk_via_bridge );
 
 /*
  *      Serverworks CSB5 IDE does not fully support native mode