Re: [PATCH] device_for_each_child(): kill pointless warning noise

From: Jeff Garzik
Date: Wed Sep 27 2006 - 21:50:41 EST

Andrew Morton wrote:
On Wed, 27 Sep 2006 21:05:18 -0400
Jeff Garzik <jeff@xxxxxxxxxx> wrote:

As the last patch demonstrated, it is quite valid for a caller to ignore
the return value of device_for_each_child(), given that the return value
is wholly dependent on the actor -- which in practice often has a
hardcoded return value.

Yes, but almost all of the instances which you found are flat-out *wrong*. They're returning 0 or 1 at random places in the callchain because they're
calling intermediate void-returning functions which are themselves dropping
error codes on the floor instead of returning them.

"almost all" Thus it is wrong to _force_ the usage model on the caller.

It should be obvious that a simple search need not _require_ a dummy return value, that is promptly ignored.

See previous email for examples.


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