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-rw-r--r--drivers/tty/n_gsm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 8d7766bfef87..da3b31a98654 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2989,7 +2989,7 @@ static int gsmtty_tiocmset(struct tty_struct *tty,
struct gsm_dlci *dlci = tty->driver_data;
unsigned int modem_tx = dlci->modem_tx;
- modem_tx &= clear;
+ modem_tx &= ~clear;
modem_tx |= set;
if (modem_tx != dlci->modem_tx) {