diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-11 01:39:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-29 01:07:04 +0300 |
| commit | 6a597a38cbaf067019db96645f36e0b1f01f306a (patch) | |
| tree | d11fcdebcb430c10363154debadd558648645403 | |
| parent | d22f8f10683c8c0f2675d9fd411a06facaf07c1b (diff) | |
| download | linux-6a597a38cbaf067019db96645f36e0b1f01f306a.tar.xz | |
serial: 8250: Remove low_latency workaround
The defunct low_latency input steering executed flush_to_ldisc()
directly from interrupt context so dropping the port lock was
necessary to avoid deadlock. That steering was removed by
commit a9c3f68f3cd8d55f809fbdb0c138ed061ea1bd25
Author: Peter Hurley <peter@hurleysoftware.com>
Date: Sat Feb 22 07:31:21 2014 -0500
tty: Fix low_latency BUG
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 48680565c991..9ef77a52c4f2 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1489,9 +1489,8 @@ unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr) break; lsr = serial_in(up, UART_LSR); } while (lsr & (UART_LSR_DR | UART_LSR_BI)); - spin_unlock(&port->lock); + tty_flip_buffer_push(&port->state->port); - spin_lock(&port->lock); return lsr; } EXPORT_SYMBOL_GPL(serial8250_rx_chars); |