From: Nikola Diklic-Perin <diklic.perin.nikola@xxxxxxxxx>
Clear bitmask was not inverted before masking modem_tx.
Calling ioctl(fd, TIOCMBIC, TIOCM_RTS) results in:
[ 197.430000] pre_modem_tx: 0x00000006
[ 197.430000] clear: 0x00000004
[ 197.430000] set: 0x00000000
[ 197.440000] post_modem_tx: 0x00000004
which is wrong.
Signed-off-by: Nikola Diklic-Perin <diklic.perin.nikola@xxxxxxxxx>
---
--- a/drivers/tty/n_gsm.c 2011-09-22 18:19:16.592480805 +0200
+++ b/drivers/tty/n_gsm.c 2011-09-21 16:15:29.506800052 +0200
@@ -2982,7 +2982,7 @@ static int gsmtty_tiocmset(struct tty_st
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) {
--
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