[PATCH v2] TTY: hvc_dcc: probe for a JTAG connection before registering

On 10/17/2013 03:20 PM, Greg Kroah-Hartman wrote:

On Thu, Oct 17, 2013 at 02:16:37PM -0500, Rob Herring wrote:

quoted

On Tue, Sep 24, 2013 at 9:05 PM, Rob Herring [off-list ref] wrote:

quoted

From: Rob Herring <redacted>

Enabling the ARM DCC console and using without a JTAG connection will
simply hang the system. Since distros like to turn on all options, this
is a reoccurring problem to debug. We can do better by checking if
anything is attached and handling characters. There is no way to probe
this, so send a newline and check that it is handled.

Cc: Paolo Pisati <redacted>
Cc: Tim Gardner <redacted>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <redacted>
Signed-off-by: Rob Herring <redacted>
---
v2: use time_is_after_jiffies

 drivers/tty/hvc/hvc_dcc.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

Greg, Jiri,

Can you please apply.

I already did, didn't you get an email saying it was applied to my tree?

Ah, yes. Found it buried in my work email. Sorry about that.

Rob