linux-kernel - [PATCH] kdb: Put a cr before lf when working w/ a non open console port

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Date:	Fri, 18 Apr 2014 10:17:28 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	Doug Anderson <dianders@...omium.org>,
	kgdb-bugreport@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] kdb: Put a cr before lf 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.

Add similar code in kdb so we don't get things like:
[0]kdb>
       [0]kdb>
              [0]kdb>

Signed-off-by: Doug Anderson <dianders@...omium.org>
---
 kernel/debug/kdb/kdb_io.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 14ff484..513ed44 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -698,6 +698,9 @@ kdb_printit:
 			len = retlen;
 			cp = kdb_buffer;
 			while (len--) {
+				if (*cp == '\n')
+					dbg_io_ops->write_char('\r');
+
 				dbg_io_ops->write_char(*cp);
 				cp++;
 			}
@@ -759,6 +762,9 @@ kdb_printit:
 			len = strlen(moreprompt);
 			cp = moreprompt;
 			while (len--) {
+				if (*cp == '\n')
+					dbg_io_ops->write_char('\r');
+
 				dbg_io_ops->write_char(*cp);
 				cp++;
 			}
-- 
1.9.1.423.g4596e3a

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