Merge commit 'v2.6.30-rc5' into core/iommu

Merge reason: core/iommu was on an .30-rc1 base,
              update it to .30-rc5 to refresh.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 12 insertions, 34 deletions

diff --git a/kernel/resource.c b/kernel/resource.c
index fd5d7d574bb9..ac5f3a36923f 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -533,43 +533,21 @@ static void __init __reserve_region_with_split(struct resource *root,
         res->end = end;
         res->flags = IORESOURCE_BUSY;
 
-        for (;;) {
-                conflict = __request_resource(parent, res);
-                if (!conflict)
-                        break;
-                if (conflict != parent) {
-                        parent = conflict;
-                        if (!(conflict->flags & IORESOURCE_BUSY))
-                                continue;
-                }
-
-                /* Uhhuh, that didn't work out.. */
-                kfree(res);
-                res = NULL;
-                break;
-        }
-
-        if (!res) {
-                /* failed, split and try again */
-
-                /* conflict covered whole area */
-                if (conflict->start <= start && conflict->end >= end)
-                        return;
+        conflict = __request_resource(parent, res);
+        if (!conflict)
+                return;
 
-                if (conflict->start > start)
-                        __reserve_region_with_split(root, start, conflict->start-1, name);
-                if (!(conflict->flags & IORESOURCE_BUSY)) {
-                        resource_size_t common_start, common_end;
+        /* failed, split and try again */
+        kfree(res);
 
-                        common_start = max(conflict->start, start);
-                        common_end = min(conflict->end, end);
-                        if (common_start < common_end)
-                                __reserve_region_with_split(root, common_start, common_end, name);
-                }
-                if (conflict->end < end)
-                        __reserve_region_with_split(root, conflict->end+1, end, name);
-        }
+        /* conflict covered whole area */
+        if (conflict->start <= start && conflict->end >= end)
+                return;
 
+        if (conflict->start > start)
+                __reserve_region_with_split(root, start, conflict->start-1, name);
+        if (conflict->end < end)
+                __reserve_region_with_split(root, conflict->end+1, end, name);
 }
 
 void __init reserve_region_with_split(struct resource *root,