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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-10-15 22:05:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:51 -0700
commitc26ec88ea86ad5122a6ea5ad635e6a1f6c395d74 (patch)
tree8e7e95851dc24327fbdb05c90b2eb0b40f60cadc /kernel/resource.c
parent923f7f6970bd448b8e88b9e4be10fd01fc7106a4 (diff)
resources: tidy __request_region()
No functional change. Just return NULL for kzalloc failure immediately, rather than wrapping the whole function body in the body of an "if". Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/resource.c')
-rw-r--r--kernel/resource.c41
1 files changed, 21 insertions, 20 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 414d6fc9131..f193d6e3ded 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -630,33 +630,34 @@ struct resource * __request_region(struct resource *parent,
{
struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
- if (res) {
- res->name = name;
- res->start = start;
- res->end = start + n - 1;
- res->flags = IORESOURCE_BUSY;
+ if (!res)
+ return NULL;
- write_lock(&resource_lock);
+ res->name = name;
+ res->start = start;
+ res->end = start + n - 1;
+ res->flags = IORESOURCE_BUSY;
- for (;;) {
- struct resource *conflict;
+ write_lock(&resource_lock);
- conflict = __request_resource(parent, res);
- if (!conflict)
- break;
- if (conflict != parent) {
- parent = conflict;
- if (!(conflict->flags & IORESOURCE_BUSY))
- continue;
- }
+ for (;;) {
+ struct resource *conflict;
- /* Uhhuh, that didn't work out.. */
- kfree(res);
- res = NULL;
+ conflict = __request_resource(parent, res);
+ if (!conflict)
break;
+ if (conflict != parent) {
+ parent = conflict;
+ if (!(conflict->flags & IORESOURCE_BUSY))
+ continue;
}
- write_unlock(&resource_lock);
+
+ /* Uhhuh, that didn't work out.. */
+ kfree(res);
+ res = NULL;
+ break;
}
+ write_unlock(&resource_lock);
return res;
}
EXPORT_SYMBOL(__request_region);