PCI: determine CLS more intelligently

[safe/jmp/linux-2.6] / drivers / pci / pci.c

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 3835871..1f9a7a0 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -47,6 +47,19 @@ unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
 unsigned long pci_hotplug_io_size  = DEFAULT_HOTPLUG_IO_SIZE;
 unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE;
 
+#ifndef PCI_CACHE_LINE_BYTES
+#define PCI_CACHE_LINE_BYTES L1_CACHE_BYTES
+#endif
+
+/*
+ * The default CLS is used if arch didn't set CLS explicitly and not
+ * all pci devices agree on the same value.  Arch can override either
+ * the dfl or actual value as it sees fit.  Don't forget this is
+ * measured in 32-bit words, not bytes.
+ */
+u8 pci_dfl_cache_line_size __initdata = PCI_CACHE_LINE_BYTES >> 2;
+u8 pci_cache_line_size;
+
 /**
  * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
  * @bus: pointer to PCI bus structure to search
@@ -1883,14 +1896,6 @@ void pci_clear_mwi(struct pci_dev *dev)
 
 #else
 
-#ifndef PCI_CACHE_LINE_BYTES
-#define PCI_CACHE_LINE_BYTES L1_CACHE_BYTES
-#endif
-
-/* This can be overridden by arch code. */
-/* Don't forget this is measured in 32-bit words, not bytes */
-u8 pci_cache_line_size = PCI_CACHE_LINE_BYTES / 4;
-
 /**
  * pci_set_cacheline_size - ensure the CACHE_LINE_SIZE register is programmed
  * @dev: the PCI device for which MWI is to be enabled
@@ -2723,17 +2728,6 @@ int __attribute__ ((weak)) pci_ext_cfg_avail(struct pci_dev *dev)
        return 1;
 }
 
-static int __devinit pci_init(void)
-{
-       struct pci_dev *dev = NULL;
-
-       while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
-               pci_fixup_device(pci_fixup_final, dev);
-       }
-
-       return 0;
-}
-
 static int __init pci_setup(char *str)
 {
        while (str) {
@@ -2771,8 +2765,6 @@ static int __init pci_setup(char *str)
 }
 early_param("pci", pci_setup);
 
-device_initcall(pci_init);
-
 EXPORT_SYMBOL(pci_reenable_device);
 EXPORT_SYMBOL(pci_enable_device_io);
 EXPORT_SYMBOL(pci_enable_device_mem);