diff options
Diffstat (limited to 'kernel/resource.c')
| -rw-r--r-- | kernel/resource.c | 16 |
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) |