The mere existence of a non-zero unit is a "reference" that needs to
prevent unloading.
The two checks (unit# and ref-count) are equivalent and redundant, and
only one of them needs to be there.
On Sun, 19 Jan 2014, Christos Zoulas wrote:
In article <pine.neb.4.64.1401191416060.22...@screamer.whooppee.com>,
Paul Goyette <p...@whooppee.com> wrote:
On Sun, 19 Jan 2014, John Nemeth wrote:
} Handled indirectly. The MODULE_CMD_FINI calls config_cfdata_detach()
} which attempts to detach each device instance. If a detach fails, then
} config_cfdata_detach fails, and the unload will fail.
Does this mean that you'll end up with some device instances
detached and not others?
Nope.
All non-zero units are prevented from unload. And unit zero is
permitted only if there are no references, ie no clones.
I don't see why non-zero units are special, can you explain? Open zero
open 1, close 0, close 1. Should the close 1 unload?
christos
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