diff options
Diffstat (limited to 'drivers/serial/8250.c')
| -rw-r--r-- | drivers/serial/8250.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 4d8e14b7aa9..dd5e1ac2225 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -2343,8 +2343,11 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, /* * CTS flow control flag and modem status interrupts + * Only disable MSI if no threads are waiting in + * serial_core::uart_wait_modem_status */ - up->ier &= ~UART_IER_MSI; + if (!waitqueue_active(&up->port.state->port.delta_msr_wait)) + up->ier &= ~UART_IER_MSI; if (!(up->bugs & UART_BUG_NOMSR) && UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; |