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tty: n_tty: simplify chars_in_buffer() 

The 'if' in chars_in_buffer() is misleadingly inverted. And since the
only difference is the head used for computation, cache the head using
ternary operator. And use that in return directly.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230827074147.2287-11-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-08-27 09:41:43 +02:00 committed by Greg Kroah-Hartman
parent 046b44ab0f
commit d88c3c2675
1 changed files with 2 additions and 6 deletions
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8
drivers/tty/n_tty.c
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@ -219,13 +219,9 @@ static void n_tty_kick_worker(const struct tty_struct *tty)
static ssize_t chars_in_buffer(const struct tty_struct *tty)
{
const struct n_tty_data *ldata = tty->disc_data;
ssize_t n = 0;
size_t head = ldata->icanon ? ldata->canon_head : ldata->commit_head;
if (!ldata->icanon)
n = ldata->commit_head - ldata->read_tail;
else
n = ldata->canon_head - ldata->read_tail;
return n;
return head - ldata->read_tail;
}
/**