linux-kernel - [PATCH 1/2] resources: set type of new resource returned by __request

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Message-ID: <20120518231832.31187.10630.stgit@bhelgaas.mtv.corp.google.com>
Date:	Fri, 18 May 2012 17:18:32 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	Ingo Molnar <mingo@...e.hu>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: [PATCH 1/2] resources: set type of new resource returned by
	__request_region()

Previously we returned a new struct resource with only IORESOURCE_BUSY
set (and possibly IORESOURCE_MUXED or IORESOURCE_EXCLUSIVE), but no
MEM/IO/etc. bits set.  The new resource should inherit the type of
its parent.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 kernel/resource.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/resource.c b/kernel/resource.c
index 7e8ea66..04bb527 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -847,7 +847,8 @@ struct resource * __request_region(struct resource *parent,
 	res->name = name;
 	res->start = start;
 	res->end = start + n - 1;
-	res->flags = IORESOURCE_BUSY;
+	res->flags = parent->flags;
+	res->flags |= IORESOURCE_BUSY;
 	res->flags |= flags;
 
 	write_lock(&resource_lock);

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