diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 4dc143eee086..de6655d50c37 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -2002,12 +2002,11 @@ dont_test_tx_en: } /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. + * Set the IER shadow for rx interrupts but defer actual interrupt + * enable until after the FIFOs are enabled; otherwise, an already- + * active sender can swamp the interrupt handler with "too much work". */ up->ier = UART_IER_RLSI | UART_IER_RDI; - serial_port_out(port, UART_IER, up->ier); if (port->flags & UPF_FOURPORT) { unsigned int icp; |