tty: Document required behavior of tty driver close()
If the tty driver open() fails, the tty driver close() is still called during the resultant tty release. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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* void (*close)(struct tty_struct * tty, struct file * filp);
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*
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* This routine is called when a particular tty device is closed.
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* Note: called even if the corresponding open() failed.
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*
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* Required method.
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*
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