diff options
| author | Yinghai Lu <Yinghai.Lu@Sun.COM> | 2008-02-04 22:27:46 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:09 -0800 |
| commit | c3e4642be734ce3d2c7398246d8cbced3a039f54 (patch) | |
| tree | 68c689b44e263501433ce73e8ccdd586d9916e43 | |
| parent | 1523508d6321436b6edfcd99aab04a344f9aed3f (diff) | |
| download | linux-c3e4642be734ce3d2c7398246d8cbced3a039f54.tar.gz linux-c3e4642be734ce3d2c7398246d8cbced3a039f54.tar.bz2 linux-c3e4642be734ce3d2c7398246d8cbced3a039f54.zip | |
serial: keep the DTR setting for serial console.
with reverting "x86, serial: convert legacy COM ports to platform devices",
we will have the serial console before the port is probled again.
uart_add_one_port==>uart_configure_port==>set_mcttrl(port, 0) will clear
the DTR setting by uart_set_options(). then I will lose my output from
serial console again.
So try to keep DTR in uart_configure_port()
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andi Kleen <ak@suse.de>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/serial/serial_core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 3bb5d241dd40..0cf382b55d4b 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -2150,10 +2150,11 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state, /* * Ensure that the modem control lines are de-activated. + * keep the DTR setting that is set in uart_set_options() * We probably don't need a spinlock around this, but */ spin_lock_irqsave(&port->lock, flags); - port->ops->set_mctrl(port, 0); + port->ops->set_mctrl(port, port->mctrl & TIOCM_DTR); spin_unlock_irqrestore(&port->lock, flags); /* |