Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c3e4642be734ce3d2c7398246d8cbced3a039f54
Commit: c3e4642be734ce3d2c7398246d8cbced3a039f54
Parent: 1523508d6321436b6edfcd99aab04a344f9aed3f
Author: Yinghai Lu <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 4 22:27:46 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Feb 5 09:44:09 2008 -0800
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 <[EMAIL PROTECTED]>
Cc: Russell King <[EMAIL PROTECTED]>
Cc: Alan Cox <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: Bjorn Helgaas <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
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 3bb5d24..0cf382b 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);
/*
-
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