diff options
| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-12-19 10:33:36 +0100 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-12-19 10:33:36 +0100 |
| commit | 01956ef82685c0793214d0bd28889304c7ed9068 (patch) | |
| tree | 8d4ec514ba1c9e88cb0fd90871777d4917ff113f /drivers/tty/serial/8250/8250_fsl.c | |
| parent | 866ced99cbaa08b8dafdc0b0febf49cd6c3cf5a8 (diff) | |
| parent | fa8a03bec68d9ef89da72277bd3501ed3daa6217 (diff) | |
Merge branch 'github.com/Freescale/linux-fslc/4.14-2.0.x-imx' into toradex_4.14-2.0.x-imx-next
Conflicts:
sound/soc/codecs/sgtl5000.c
Diffstat (limited to 'drivers/tty/serial/8250/8250_fsl.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_fsl.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c index 910bfee5a88b..cc138c24ae88 100644 --- a/drivers/tty/serial/8250/8250_fsl.c +++ b/drivers/tty/serial/8250/8250_fsl.c @@ -48,8 +48,29 @@ int fsl8250_handle_irq(struct uart_port *port) lsr = orig_lsr = up->port.serial_in(&up->port, UART_LSR); - if (lsr & (UART_LSR_DR | UART_LSR_BI)) + /* Process incoming characters first */ + if ((lsr & (UART_LSR_DR | UART_LSR_BI)) && + (up->ier & (UART_IER_RLSI | UART_IER_RDI))) { lsr = serial8250_rx_chars(up, lsr); + } + + /* Stop processing interrupts on input overrun */ + if ((orig_lsr & UART_LSR_OE) && (up->overrun_backoff_time_ms > 0)) { + unsigned long delay; + + up->ier = port->serial_in(port, UART_IER); + if (up->ier & (UART_IER_RLSI | UART_IER_RDI)) { + port->ops->stop_rx(port); + } else { + /* Keep restarting the timer until + * the input overrun subsides. + */ + cancel_delayed_work(&up->overrun_backoff); + } + + delay = msecs_to_jiffies(up->overrun_backoff_time_ms); + schedule_delayed_work(&up->overrun_backoff, delay); + } serial8250_modem_status(up); |