alpha: fix legacy mode PCI IDE controllers

Legacy IDE resources were never properly allocated on most
alpha platforms, so IDE expectedly stopped working after
commit 10f000a2fd805e8ccfe988e8615545467bb7f7df (generic
pci_enable_resources).

Always allocate "fixed" PCI resources before doing anything else;
remove Cypress IDE quirk, as it's a generic problem which is
handled in common PCI probe code.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 7 insertions, 17 deletions

diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index c107cc08daf4..78357798b6fd 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -71,25 +71,13 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82378, quirk_i
 static void __init
 quirk_cypress(struct pci_dev *dev)
 {
-        /* The Notorious Cy82C693 chip.  */
-
-        /* The Cypress IDE controller doesn't support native mode, but it
-           has programmable addresses of IDE command/control registers.
-           This violates PCI specifications, confuses the IDE subsystem and
-           causes resource conflicts between the primary HD_CMD register and
-           the floppy controller.  Ugh.  Fix that.  */
-        if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE) {
-                dev->resource[0].flags = 0;
-                dev->resource[1].flags = 0;
-        }
-
         /* The Cypress bridge responds on the PCI bus in the address range
            0xffff0000-0xffffffff (conventional x86 BIOS ROM).  There is no
            way to turn this off.  The bridge also supports several extended
            BIOS ranges (disabled after power-up), and some consoles do turn
            them on.  So if we use a large direct-map window, or a large SG
            window, we must avoid the entire 0xfff00000-0xffffffff region.  */
-        else if (dev->class >> 8 == PCI_CLASS_BRIDGE_ISA) {
+        if (dev->class >> 8 == PCI_CLASS_BRIDGE_ISA) {
                 if (__direct_map_base + __direct_map_size >= 0xfff00000UL)
                         __direct_map_size = 0xfff00000UL - __direct_map_base;
                 else {
@@ -391,7 +379,7 @@ pcibios_set_master(struct pci_dev *dev)
         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
 }
 
-static void __init
+void __init
 pcibios_claim_one_bus(struct pci_bus *b)
 {
         struct pci_dev *dev;
@@ -405,7 +393,8 @@ pcibios_claim_one_bus(struct pci_bus *b)
 
                         if (r->parent || !r->start || !r->flags)
                                 continue;
-                        pci_claim_resource(dev, i);
+                        if (pci_probe_only || (r->flags & IORESOURCE_PCI_FIXED))
+                                pci_claim_resource(dev, i);
                 }
         }
 
@@ -444,8 +433,7 @@ common_init_pci(void)
                 }
         }
 
-        if (pci_probe_only)
-                pcibios_claim_console_setup();
+        pcibios_claim_console_setup();
 
         pci_assign_unassigned_resources();
         pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
index 920196bcbb61..a7f23b5ab814 100644
--- a/arch/alpha/kernel/sys_nautilus.c
+++ b/arch/alpha/kernel/sys_nautilus.c
@@ -187,6 +187,7 @@ nautilus_machine_check(unsigned long vector, unsigned long la_ptr)
 }
 
 extern void free_reserved_mem(void *, void *);
+extern void pcibios_claim_one_bus(struct pci_bus *);
 
 static struct resource irongate_mem = {
         .name   = "Irongate PCI MEM",
@@ -205,6 +206,7 @@ nautilus_init_pci(void)
         /* Scan our single hose.  */
         bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
         hose->bus = bus;
+        pcibios_claim_one_bus(bus);
 
         irongate = pci_get_bus_and_slot(0, 0);
         bus->self = irongate;