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-rw-r--r--kernel/resource.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 26e9f2546923..89d50412508c 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -374,6 +374,11 @@ static void resource_clip(struct resource *res, resource_size_t min,
res->end = max;
}
+static bool resource_contains(struct resource *res1, struct resource *res2)
+{
+ return res1->start <= res2->start && res1->end >= res2->end;
+}
+
/*
* Find empty slot in the resource tree given range and alignment.
*/
@@ -387,7 +392,7 @@ static int find_resource(struct resource *root, struct resource *new,
void *alignf_data)
{
struct resource *this = root->child;
- struct resource tmp = *new;
+ struct resource tmp = *new, alloc;
tmp.start = root->start;
/*
@@ -407,10 +412,11 @@ static int find_resource(struct resource *root, struct resource *new,
resource_clip(&tmp, min, max);
tmp.start = ALIGN(tmp.start, align);
- tmp.start = alignf(alignf_data, &tmp, size, align);
- if (tmp.start < tmp.end && tmp.end - tmp.start >= size - 1) {
- new->start = tmp.start;
- new->end = tmp.start + size - 1;
+ alloc.start = alignf(alignf_data, &tmp, size, align);
+ alloc.end = alloc.start + size - 1;
+ if (resource_contains(&tmp, &alloc)) {
+ new->start = alloc.start;
+ new->end = alloc.end;
return 0;
}
if (!this)