tty: incorrect test of echo_buf() result for ECHO_OP_START

test echo_buf() result for ECHO_OP_START

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 4e69f3bd7fd8..7cdd1eb9406c 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -767,7 +767,7 @@ static size_t __process_echoes(struct tty_struct *tty)
          * of echo overrun before the next commit), then discard enough
          * data at the tail to prevent a subsequent overrun */
         while (ldata->echo_commit - tail >= ECHO_DISCARD_WATERMARK) {
-                if (echo_buf(ldata, tail == ECHO_OP_START)) {
+                if (echo_buf(ldata, tail) == ECHO_OP_START) {
                         if (echo_buf(ldata, tail) == ECHO_OP_ERASE_TAB)
                                 tail += 3;
                         else