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authorBjorn Helgaas <bhelgaas@google.com>2014-02-05 07:32:28 +0400
committerBjorn Helgaas <bhelgaas@google.com>2014-02-27 01:42:09 +0400
commit5edb93b89f6cc3089ee283656555e7a9ad36a8a0 (patch)
tree496964f830aa06af8351de8645ec7e19ef931264 /kernel/resource.c
parentd2e074ccbf84e91819ae07b3ca838120db2c97a9 (diff)
downloadlinux-5edb93b89f6cc3089ee283656555e7a9ad36a8a0.tar.xz
resource: Add resource_contains()
We have two identical copies of resource_contains() already, and more places that could use it. This moves it to ioport.h where it can be shared. resource_contains(struct resource *r1, struct resource *r2) returns true iff r1 and r2 are the same type (most callers already checked this separately) and the r1 address range completely contains r2. In addition, the new resource_contains() checks that both r1 and r2 have addresses assigned to them. If a resource is IORESOURCE_UNSET, it doesn't have a valid address and can't contain or be contained by another resource. Some callers already check this or for res->start. No functional change. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'kernel/resource.c')
-rw-r--r--kernel/resource.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 3f285dce9347..a8344dda7049 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -432,11 +432,6 @@ 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 with the given range and
* alignment constraints
@@ -471,10 +466,11 @@ static int __find_resource(struct resource *root, struct resource *old,
arch_remove_reservations(&tmp);
/* Check for overflow after ALIGN() */
- avail = *new;
avail.start = ALIGN(tmp.start, constraint->align);
avail.end = tmp.end;
+ avail.flags = new->flags & ~IORESOURCE_UNSET;
if (avail.start >= tmp.start) {
+ alloc.flags = avail.flags;
alloc.start = constraint->alignf(constraint->alignf_data, &avail,
size, constraint->align);
alloc.end = alloc.start + size - 1;