diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2015-06-27 09:28:55 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-23 15:24:12 -0700 |
| commit | 5bac4b3d2592c281a9b2614070140b116bd0b0a9 (patch) | |
| tree | 7a02869c31997071ca4148bb82f8fd160e2c5200 /drivers/tty/serial/8250 | |
| parent | 27c93af7e7d9ccdfa28e26767c09106bf0721998 (diff) | |
| download | blackbird-op-linux-5bac4b3d2592c281a9b2614070140b116bd0b0a9.tar.gz blackbird-op-linux-5bac4b3d2592c281a9b2614070140b116bd0b0a9.zip | |
serial: 8250_omap: Remove auto-IXON flow control
OMAP h/w-assisted IXON flow control is borked. The transmitter becomes
stuck if XON is never received; clearing the fifos or resetting the
rx flow control bits has no effect.
Remove auto-IXANY as well, since without auto-IXON, it has no purpose.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250')
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index d9a37191a1ae..0340ee6ba970 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -447,12 +447,9 @@ static void omap_8250_set_termios(struct uart_port *port, priv->efr |= UART_EFR_CTS; } else if (up->port.flags & UPF_SOFT_FLOW) { /* - * IXON Flag: - * Enable XON/XOFF flow control on input. - * Receiver compares XON1, XOFF1. + * OMAP rx s/w flow control is borked; the transmitter remains + * stuck off even if rx flow control is subsequently disabled */ - if (termios->c_iflag & IXON) - priv->efr |= OMAP_UART_SW_RX; /* * IXOFF Flag: @@ -463,15 +460,6 @@ static void omap_8250_set_termios(struct uart_port *port, up->port.status |= UPSTAT_AUTOXOFF; priv->efr |= OMAP_UART_SW_TX; } - - /* - * IXANY Flag: - * Enable any character to restart output. - * Operation resumes after receiving any - * character after recognition of the XOFF character - */ - if (termios->c_iflag & IXANY) - up->mcr |= UART_MCR_XONANY; } omap8250_restore_regs(up); |
