TX is not supposed to be started from tty_operations::put_char. Line
disciplines ought to call tty_operations::put_char several times and
then do a single tty_operations::flush_chars to start TX.
Fix this in mxser by removing TX startup from mxser_put_char.
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/tty/mxser.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index daf820c086f4..52dbdd4282b2 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -998,17 +998,7 @@ static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
info->xmit_head &= SERIAL_XMIT_SIZE - 1;
info->xmit_cnt++;
spin_unlock_irqrestore(&info->slock, flags);
- if (!tty->flow.stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- info->board->must_hwid) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
+
return 1;
}
--
2.32.0
