[PATCH v2 2/2] drm/amd/display: Don't call dm_log_to_buffer directly in dc_conn_log

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer at amd.com>

dm_log_to_buffer logs unconditionally, so calling it directly resulted
in the main message being logged even when the event type isn't enabled
in the event mask.

To fix this, use the new dm_logger_append_va API.

Fixes spurious messages like

 [drm] {1920x1200, 2080x1235 at 154000Khz}

in dmesg when a mode is set.

v2:
* Use new dm_logger_append_va API, fixes incorrect va_list usage in v1
* Just use and decrease entry.buf_offset to get rid of the trailing
  newline

Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 drivers/gpu/drm/amd/display/dc/basics/log_helpers.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/basics/log_helpers.c b/drivers/gpu/drm/amd/display/dc/basics/log_helpers.c
index 785b943b60ed..fe1648f81d71 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/log_helpers.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/log_helpers.c
@@ -80,15 +80,11 @@ void dc_conn_log(struct dc_context *ctx,
 			link->link_index);
 
 	va_start(args, msg);
-	entry.buf_offset += dm_log_to_buffer(
-		&entry.buf[entry.buf_offset],
-		LOG_MAX_LINE_SIZE - entry.buf_offset,
-		msg, args);
+	dm_logger_append_va(&entry, msg, args);
 
-	if (entry.buf[strlen(entry.buf) - 1] == '\n') {
-		entry.buf[strlen(entry.buf) - 1] = '\0';
+	if (entry.buf_offset > 0 &&
+	    entry.buf[entry.buf_offset - 1] == '\n')
 		entry.buf_offset--;
-	}
 
 	if (hex_data)
 		for (i = 0; i < hex_data_count; i++)
-- 
2.15.0