From: Bjorn Helgaas <bhelgaas@google.com>
Date: Wed, 5 Feb 2014 03:32:28 +0000 (-0800)
Subject: resource: Add resource_contains()
X-Git-Tag: v3.15-rc1~143^2^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5edb93b89f6cc3089ee283656555e7a9ad36a8a0;p=pandora-kernel.git

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>
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