# HG changeset patch
# User asl
# Date 1074588810 0
# Node ID b300f8978722a43158b7a7364eb3d2f1d166977a
# Parent  f2453fae08d493eb8df52081ec71d038fd36ab5d
       * src/common/serial.c: serial_write() was returning an incorrect
       result code in non-blocking mode when output was blocked.  The
       previous code would return ENOERR with 0 bytes written.  This
       was fixed to return EAGAIN.

diff --git a/packages/io/serial/current/ChangeLog b/packages/io/serial/current/ChangeLog
--- a/packages/io/serial/current/ChangeLog
+++ b/packages/io/serial/current/ChangeLog
@@ -1,3 +1,10 @@
+2004-01-12  Dan Jakubiec <djakubiec@yahoo.com>
+
+	* src/common/serial.c: serial_write() was returning an incorrect
+	result code in non-blocking mode when output was blocked.  The
+	previous code would return ENOERR with 0 bytes written.  This
+	was fixed to return EAGAIN.
+
 2003-08-18  Jay Foster <jay@systech.com>
 
 	* src/common/serial.c: Fixed bug for XON/XOFF flow control that
diff --git a/packages/io/serial/current/src/common/serial.c b/packages/io/serial/current/src/common/serial.c
--- a/packages/io/serial/current/src/common/serial.c
+++ b/packages/io/serial/current/src/common/serial.c
@@ -354,7 +354,7 @@ serial_write(cyg_io_handle_t handle, con
                     if (!cbuf->blocking) {
                         *len -= size;   // number of characters actually sent
                         cbuf->waiting = false;
-                        res = size == 0 ? -EAGAIN : ENOERR;
+                        res = (*len == 0) ? -EAGAIN : ENOERR;
                         break;
                     }
 #endif // CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING