Alexey Dobriyan 300b994b74 proc: fix return value of proc_reg_open() in "too late" case
If ->open() wasn't called, returning 0 is misleading and, theoretically,
oopsable:
1) remove_proc_entry clears ->proc_fops, drops lock,
2) ->open "succeeds",
3) ->release oopses, because it assumes ->open was called (single_release()).

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2008-10-10 04:18:54 +04:00
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