From e36bd4b2431ee659f473ca807e9a9fcef8c2e894 Mon Sep 17 00:00:00 2001
From: px4dev <px4@purgatory.org>
Date: Fri, 2 Nov 2012 22:46:35 -0700
Subject: [PATCH] Fix transmit error reporting.

---
 apps/systemlib/hx_stream.c | 11 +++++------
 apps/systemlib/hx_stream.h |  3 +--
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/apps/systemlib/hx_stream.c b/apps/systemlib/hx_stream.c
index 7ee9888ea0..aabb786d48 100644
--- a/apps/systemlib/hx_stream.c
+++ b/apps/systemlib/hx_stream.c
@@ -186,10 +186,8 @@ hx_stream_send(hx_stream_t stream,
 	const uint8_t *p = (const uint8_t *)data;
 	unsigned resid = count;
 
-	if (resid > HX_STREAM_MAX_FRAME) {
-		errno = EINVAL;
-		return -1;
-	}
+	if (resid > HX_STREAM_MAX_FRAME)
+		return -EINVAL;
 
 	/* start the frame */
 	hx_tx_raw(stream, FBO);
@@ -214,10 +212,11 @@ hx_stream_send(hx_stream_t stream,
 	/* check for transmit error */
 	if (stream->txerror) {
 		stream->txerror = false;
-		return -1;
+		return -EIO;
 	}
 
-	return -1;
+	perf_count(stream->pc_tx_frames);
+	return 0;
 }
 
 void
diff --git a/apps/systemlib/hx_stream.h b/apps/systemlib/hx_stream.h
index ac3b3e99de..128689953a 100644
--- a/apps/systemlib/hx_stream.h
+++ b/apps/systemlib/hx_stream.h
@@ -102,8 +102,7 @@ __EXPORT extern void		hx_stream_set_counters(hx_stream_t stream,
  * @param stream	A handle returned from hx_stream_init.
  * @param data		Pointer to the data to send.
  * @param count		The number of bytes to send.
- * @return		Zero on success, nonzero with errno
- *			set on error.
+ * @return		Zero on success, -errno on error.
  */
 __EXPORT extern int		hx_stream_send(hx_stream_t stream,
 		const void *data,