diff options
author | Doug Anderson <dianders@chromium.org> | 2014-04-21 10:06:43 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-24 16:13:01 -0700 |
commit | c7d44a02ac606c2bebf90751deebec2321379d6d (patch) | |
tree | 3d16a26ddadb9f1f2b3a52ccffa7691925ce552a /drivers/tty/serial | |
parent | 0f1e126b8c50a479a9047654f8ceda5ccfaa0d8a (diff) | |
download | op-kernel-dev-c7d44a02ac606c2bebf90751deebec2321379d6d.zip op-kernel-dev-c7d44a02ac606c2bebf90751deebec2321379d6d.tar.gz |
serial_core: Commonalize crlf when working w/ a non open console port
In (efe2f29 kgdboc,kdb: Allow kdb to work on a non open console port)
support was added to directly use the "write_char" functions when
doing kdb over a non-open console port. This is great, but it ends up
bypassing the normal code in uart_console_write() that adds a carriage
return before any newlines.
There appears to have been a trend to add this support directly in
some console driver's poll_put_char() functions. This had a few side
effects, including:
- In this case we were doing LFCR, not CRLF. This was fixed in
uart_console_write() back in (d358788 [SERIAL] kernel console should
send CRLF not LFCR)
- Not all serial drivers had the LFCR code in their poll_put_char()
functions. In my case I was running serial/samsung.c which lacked
it.
I've moved the handling to uart_poll_put_char() to fix the above
problems. Now when I use kdb (and don't point console= to the same
UART) I no longer get:
[0]kdb>
[0]kdb>
[0]kdb>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
-rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 5 | ||||
-rw-r--r-- | drivers/tty/serial/pch_uart.c | 5 | ||||
-rw-r--r-- | drivers/tty/serial/pxa.c | 5 | ||||
-rw-r--r-- | drivers/tty/serial/serial_core.c | 3 | ||||
-rw-r--r-- | drivers/tty/serial/serial_txx9.c | 5 |
5 files changed, 3 insertions, 20 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 81f909c..ffee982 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1926,13 +1926,8 @@ static void serial8250_put_poll_char(struct uart_port *port, wait_for_xmitr(up, BOTH_EMPTY); /* * Send the character out. - * If a LF, also do CR... */ serial_port_out(port, UART_TX, c); - if (c == 10) { - wait_for_xmitr(up, BOTH_EMPTY); - serial_port_out(port, UART_TX, 13); - } /* * Finally, wait for transmitter to become empty diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index e194bb3..0cb6a8e 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1590,13 +1590,8 @@ static void pch_uart_put_poll_char(struct uart_port *port, wait_for_xmitr(priv, UART_LSR_THRE); /* * Send the character out. - * If a LF, also do CR... */ iowrite8(c, priv->membase + PCH_UART_THR); - if (c == 10) { - wait_for_xmitr(priv, UART_LSR_THRE); - iowrite8(13, priv->membase + PCH_UART_THR); - } /* * Finally, wait for transmitter to become empty diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index f9f20f3..9e7ee39 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -711,13 +711,8 @@ static void serial_pxa_put_poll_char(struct uart_port *port, wait_for_xmitr(up); /* * Send the character out. - * If a LF, also do CR... */ serial_out(up, UART_TX, c); - if (c == 10) { - wait_for_xmitr(up); - serial_out(up, UART_TX, 13); - } /* * Finally, wait for transmitter to become empty diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index f26834d2..5dba976 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2236,6 +2236,9 @@ static void uart_poll_put_char(struct tty_driver *driver, int line, char ch) return; port = state->uart_port; + + if (ch == '\n') + port->ops->poll_put_char(port, '\r'); port->ops->poll_put_char(port, ch); } #endif diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index 90a080b..60f49b9 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -535,13 +535,8 @@ static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c) wait_for_xmitr(up); /* * Send the character out. - * If a LF, also do CR... */ sio_out(up, TXX9_SITFIFO, c); - if (c == 10) { - wait_for_xmitr(up); - sio_out(up, TXX9_SITFIFO, 13); - } /* * Finally, wait for transmitter to become empty |