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resources: allow adjust_resource() for resources with no parent

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If a resource has no parent, allow its start/end to be set arbitrarily
as long as any children are still contained within the new range.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu 2012-05-17 18:51:11 -07:00 committed by Bjorn Helgaas
parent 5cc62c2022
commit 82ec90eac3
1 changed files with 8 additions and 5 deletions
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13
kernel/resource.c
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@ -722,14 +722,12 @@ int adjust_resource(struct resource *res, resource_size_t start, resource_size_t
write_lock(&resource_lock); write_lock(&resource_lock);
if (!parent)
goto skip;
if ((start < parent->start) || (end > parent->end)) if ((start < parent->start) || (end > parent->end))
goto out; goto out;
for (tmp = res->child; tmp; tmp = tmp->sibling) {
if ((tmp->start < start) || (tmp->end > end))
goto out;
}
if (res->sibling && (res->sibling->start <= end)) if (res->sibling && (res->sibling->start <= end))
goto out; goto out;
@ -741,6 +739,11 @@ int adjust_resource(struct resource *res, resource_size_t start, resource_size_t
goto out; goto out;
} }
skip:
for (tmp = res->child; tmp; tmp = tmp->sibling)
if ((tmp->start < start) || (tmp->end > end))
goto out;
res->start = start; res->start = start;
res->end = end; res->end = end;
result = 0; result = 0;