1 files changed, 8 insertions, 3 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index a1d582e3862..29c2160bcbb 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2046,6 +2046,7 @@ static void __init fixup_device_tree_maple(void)
 /*
  * Pegasos and BriQ lacks the "ranges" property in the isa node
  * Pegasos needs decimal IRQ 14/15, not hexadecimal
+ * Pegasos has the IDE configured in legacy mode, but advertised as native
  */
 static void __init fixup_device_tree_chrp(void)
 {
@@ -2083,9 +2084,13 @@ static void __init fixup_device_tree_chrp(void)
                 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
                 prop[0] = 14;
                 prop[1] = 0x0;
-                prop[2] = 15;
-                prop[3] = 0x0;
-                prom_setprop(ph, name, "interrupts", prop, 4*sizeof(u32));
+                prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
+                prom_printf("Fixing up IDE class-code on Pegasos...\n");
+                rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
+                if (rc == sizeof(u32)) {
+                        prop[0] &= ~0x5;
+                        prom_setprop(ph, name, "class-code", prop, sizeof(u32));
+                }
         }
 }
 #else