tty: Fix hvc return
HVC returns a size of -1 bytes for the write room in some cases. This is bogus and not handled by the tty layer at all. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -558,7 +558,7 @@ static int hvc_write_room(struct tty_struct *tty)
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struct hvc_struct *hp = tty->driver_data;
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if (!hp)
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return -1;
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return 0;
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return hp->outbuf_size - hp->n_outbuf;
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}
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