Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
new file mode 100644
index 000000000000..a251289c9958
--- /dev/null
+++ b/drivers/pci/setup-irq.c
@@ -0,0 +1,64 @@
+/*
+ *      drivers/pci/setup-irq.c
+ *
+ * Extruded from code written by
+ *      Dave Rusling (david.rusling@reo.mts.dec.com)
+ *      David Mosberger (davidm@cs.arizona.edu)
+ *      David Miller (davem@redhat.com)
+ *
+ * Support routines for initializing a PCI subsystem.
+ */
+
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/cache.h>
+
+
+static void __init
+pdev_fixup_irq(struct pci_dev *dev,
+               u8 (*swizzle)(struct pci_dev *, u8 *),
+               int (*map_irq)(struct pci_dev *, u8, u8))
+{
+        u8 pin, slot;
+        int irq;
+
+        /* If this device is not on the primary bus, we need to figure out
+           which interrupt pin it will come in on.   We know which slot it
+           will come in on 'cos that slot is where the bridge is.   Each
+           time the interrupt line passes through a PCI-PCI bridge we must
+           apply the swizzle function.  */
+
+        pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+        /* Cope with 0 and illegal. */
+        if (pin == 0 || pin > 4)
+                pin = 1;
+
+        /* Follow the chain of bridges, swizzling as we go.  */
+        slot = (*swizzle)(dev, &pin);
+
+        irq = (*map_irq)(dev, slot, pin);
+        if (irq == -1)
+                irq = 0;
+        dev->irq = irq;
+
+        pr_debug("PCI: fixup irq: (%s) got %d\n",
+                dev->dev.kobj.name, dev->irq);
+
+        /* Always tell the device, so the driver knows what is
+           the real IRQ to use; the device does not use it. */
+        pcibios_update_irq(dev, irq);
+}
+
+void __init
+pci_fixup_irqs(u8 (*swizzle)(struct pci_dev *, u8 *),
+               int (*map_irq)(struct pci_dev *, u8, u8))
+{
+        struct pci_dev *dev = NULL;
+        while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+                pdev_fixup_irq(dev, swizzle, map_irq);
+        }
+}