[MIPS] SMTC: Fix crash on bootup with idebus= command line argument.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 25 insertions, 51 deletions

diff --git a/include/asm-mips/mach-generic/ide.h b/include/asm-mips/mach-generic/ide.h
index 6eba2e576aaa..2b928577be5d 100644
--- a/include/asm-mips/mach-generic/ide.h
+++ b/include/asm-mips/mach-generic/ide.h
@@ -29,68 +29,42 @@
 
 #define IDE_ARCH_OBSOLETE_DEFAULTS
 
-static __inline__ int ide_probe_legacy(void)
-{
-#ifdef CONFIG_PCI
-        struct pci_dev *dev;
-        if ((dev = pci_get_class(PCI_CLASS_BRIDGE_EISA << 8, NULL)) != NULL ||
-            (dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL)) != NULL) {
-                pci_dev_put(dev);
-
-                return 1;
-        }
-        return 0;
-#elif defined(CONFIG_EISA) || defined(CONFIG_ISA)
-        return 1;
-#else
-        return 0;
-#endif
-}
-
 static __inline__ int ide_default_irq(unsigned long base)
 {
-        if (ide_probe_legacy())
-                switch (base) {
-                case 0x1f0:
-                        return 14;
-                case 0x170:
-                        return 15;
-                case 0x1e8:
-                        return 11;
-                case 0x168:
-                        return 10;
-                case 0x1e0:
-                        return 8;
-                case 0x160:
-                        return 12;
+        switch (base) {
+                case 0x1f0: return 14;
+                case 0x170: return 15;
+                case 0x1e8: return 11;
+                case 0x168: return 10;
+                case 0x1e0: return 8;
+                case 0x160: return 12;
                 default:
                         return 0;
-                }
-        else
-                return 0;
+        }
 }
 
 static __inline__ unsigned long ide_default_io_base(int index)
 {
-        if (ide_probe_legacy())
+        /*
+         *      If PCI is present then it is not safe to poke around
+         *      the other legacy IDE ports. Only 0x1f0 and 0x170 are
+         *      defined compatibility mode ports for PCI. A user can
+         *      override this using ide= but we must default safe.
+         */
+        if (no_pci_devices()) {
                 switch (index) {
-                case 0:
-                        return 0x1f0;
-                case 1:
-                        return 0x170;
-                case 2:
-                        return 0x1e8;
-                case 3:
-                        return 0x168;
-                case 4:
-                        return 0x1e0;
-                case 5:
-                        return 0x160;
-                default:
-                        return 0;
+                case 2: return 0x1e8;
+                case 3: return 0x168;
+                case 4: return 0x1e0;
+                case 5: return 0x160;
                 }
-        else
+        }
+        switch (index) {
+        case 0: return 0x1f0;
+        case 1: return 0x170;
+        default:
                 return 0;
+        }
 }
 
 #define IDE_ARCH_OBSOLETE_INIT