tree 496964f830aa06af8351de8645ec7e19ef931264
parent d2e074ccbf84e91819ae07b3ca838120db2c97a9
author Bjorn Helgaas <bhelgaas@google.com> 1391571148 -0800
committer Bjorn Helgaas <bhelgaas@google.com> 1393450929 -0700

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>