serial: Report other errors (besides timeout) on serial write

(ret < len) means either a timeout (not all bytes were written, ret >= 0 but < than len) or something else failed (ret < 0). Signed-off-by: Dan Nechita <[email protected]>
analogdevicesinc · Mar 4, 2021 · bcb3864 · bcb3864
1 parent 89e337b
commit bcb3864
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/serial.c b/serial.c
@@ -272,7 +272,10 @@ static ssize_t serial_write_data(struct iio_context_pdata *pdata,
 
 	IIO_DEBUG("Write returned %li: %s\n", (long) ret, data);
 
-	if (ret < len) {
+	if (ret < 0) {
+		IIO_ERROR("sp_blocking_write returned %i\n", (int) ret);
+		return ret;
+	} else if (ret < len) {
 		IIO_ERROR("sp_blocking_write has timedout\n");
 		return -ETIMEDOUT;
 	}