From: Uwe Hermann <redacted>
Date: Sun, 1 Dec 2013 18:30:35 +0000 (+0100)
Subject: serial-dmm: No error message upon 0 new bytes.
X-Git-Tag: libsigrok-0.3.0~517
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=66a435766721dd6ecdbce7b31a2f43c2e0752a12;p=libsigrok.git

serial-dmm: No error message upon 0 new bytes.
---

diff --git a/hardware/serial-dmm/protocol.c b/hardware/serial-dmm/protocol.c
index 6ca5e73e..fab6c4ae 100644
--- a/hardware/serial-dmm/protocol.c
+++ b/hardware/serial-dmm/protocol.c
@@ -80,7 +80,9 @@ static void handle_new_data(struct sr_dev_inst *sdi, int dmm, void *info)
 	/* Try to get as much data as the buffer can hold. */
 	len = DMM_BUFSIZE - devc->buflen;
 	len = serial_read(serial, devc->buf + devc->buflen, len);
-	if (len < 1) {
+	if (len == 0)
+		return; /* No new bytes, nothing to do. */
+	if (len < 0) {
 		sr_err("Serial port read error: %d.", len);
 		return;
 	}