idr: fix idr_replace()'s returned error code

When the smaller id is not found, idr_replace() returns -ENOENT.  But
when the id is bigger enough, idr_replace() returns -EINVAL, actually
there is no difference between these two kinds of ids.

These are all unallocated id, the return values of the idr_replace() for
these ids should be the same: -ENOENT.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/idr.c

@@ -814,10 +814,10 @@ void *idr_replace(struct idr *idp, void *ptr, int id)
 
 	p = idp->top;
 	if (!p)
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-ENOENT);
 
 	if (id > idr_max(p->layer + 1))
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-ENOENT);
 
 	n = p->layer * IDR_BITS;
 	while ((n > 0) && p) {