From 73713357ab58aacda1af715bb5a623528dbbfd79 Mon Sep 17 00:00:00 2001 From: Zhi Yong Wu Date: Sat, 7 Dec 2013 04:55:00 +0800 Subject: [PATCH] tun: remove useless codes in tun_chr_aio_read() and tun_recvmsg() By checking related codes, it is impossible that ret > len or total_len, so we should remove some useless codes in both above functions. Signed-off-by: Zhi Yong Wu Signed-off-by: David S. Miller --- drivers/net/tun.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 3c5a8d8cde50..bbb693512918 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1354,7 +1354,6 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv, ret = tun_do_read(tun, tfile, iv, len, file->f_flags & O_NONBLOCK); - ret = min_t(ssize_t, ret, len); if (ret > 0) iocb->ki_pos = ret; out: @@ -1455,10 +1454,6 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock, } ret = tun_do_read(tun, tfile, m->msg_iov, total_len, flags & MSG_DONTWAIT); - if (ret > total_len) { - m->msg_flags |= MSG_TRUNC; - ret = flags & MSG_TRUNC ? ret : total_len; - } out: tun_put(tun); return ret; -- 2.20.1