resources: Set type in __request_region()

We don't set the type (I/O, memory, etc.) of resources added by
__request_region(), which leads to confusing messages like this:

    address space collision: [io  0x1000-0x107f] conflicts with ACPI CPU throttle [??? 0x00001010-0x00001015 flags 0x80000000]

Set the type of a new resource added by __request_region() (used by
request_region() and request_mem_region()) to the type of its parent.  This
makes the resource tree internally consistent and fixes messages like the
above, where the ACPI CPU throttle resource really is an I/O port region,
but request_region() didn't fill in the type, so %pR didn't know how to
print it.

Sample dmesg showing the issue at the link below.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=71611
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/kernel/resource.c b/kernel/resource.c
index a8344dd..673061c 100644 (file)
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -945,8 +945,8 @@ struct resource * __request_region(struct resource *parent,
        res->name = name;
        res->start = start;
        res->end = start + n - 1;
-       res->flags = IORESOURCE_BUSY;
-       res->flags |= flags;
+       res->flags = resource_type(parent);
+       res->flags |= IORESOURCE_BUSY | flags;
 
        write_lock(&resource_lock);