tools: kwboot: Do not change received character in kwboot_xm_recv_reply()

Marvell BootROM expects retransmission of previous xmodem packet only in
the case when it sends NAK response to the host.

Do not change non-xmodem response (possibly UART transfer error) to NAK
in kwboot_xm_recv_reply() function. Allow caller to receive original
response from device.

Change argument 'nak_on_non_xm' to 'stop_on_non_xm'. Instead of changing
non-xmodem character to NAK, stop processing on invalid character and
return it.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 0b97990..a619a6c 100644 (file)
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -875,7 +875,7 @@ kwboot_baud_magic_handle(int fd, char c, int baudrate)
 }
 
 static int
-kwboot_xm_recv_reply(int fd, char *c, int nak_on_non_xm,
+kwboot_xm_recv_reply(int fd, char *c, int stop_on_non_xm,
                     int ignore_nak_reply,
                     int allow_non_xm, int *non_xm_print,
                     int baudrate, int *baud_changed)
@@ -931,10 +931,8 @@ kwboot_xm_recv_reply(int fd, char *c, int nak_on_non_xm,
                                *non_xm_print = 1;
                        }
                } else {
-                       if (nak_on_non_xm) {
-                               *c = NAK;
+                       if (stop_on_non_xm)
                                break;
-                       }
                        timeout = recv_until - _now();
                        if (timeout < 0) {
                                errno = ETIMEDOUT;