Not all new program versions necessarily introduce
non-backwards-compatible protocol changes. We thus move the definition
of the protocol version from configure.ac to usbip_network.h, where it
logically belongs to.

Signed-off-by: Dominik Paulus <dominik.pau...@fau.de>
Signed-off-by: Tobias Polzer <tobias.pol...@fau.de>
---
 drivers/staging/usbip/userspace/configure.ac        | 1 -
 drivers/staging/usbip/userspace/src/usbip_network.c | 6 +++---
 drivers/staging/usbip/userspace/src/usbip_network.h | 6 ++++++
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/usbip/userspace/configure.ac 
b/drivers/staging/usbip/userspace/configure.ac
index 2208516..bc08b81 100644
--- a/drivers/staging/usbip/userspace/configure.ac
+++ b/drivers/staging/usbip/userspace/configure.ac
@@ -2,7 +2,6 @@ dnl Process this file with autoconf to produce a configure 
script.
 
 AC_PREREQ(2.59)
 AC_INIT([usbip-utils], [1.1.1], [linux-...@vger.kernel.org])
-AC_DEFINE([USBIP_VERSION], [0x00000111], [binary-coded decimal version number])
 
 CURRENT=0
 REVISION=1
diff --git a/drivers/staging/usbip/userspace/src/usbip_network.c 
b/drivers/staging/usbip/userspace/src/usbip_network.c
index e573cb2..a606e2b 100644
--- a/drivers/staging/usbip/userspace/src/usbip_network.c
+++ b/drivers/staging/usbip/userspace/src/usbip_network.c
@@ -156,7 +156,7 @@ int usbip_net_send_op_common(int sockfd, uint32_t code, 
uint32_t status)
 
        memset(&op_common, 0, sizeof(op_common));
 
-       op_common.version = USBIP_VERSION;
+       op_common.version = PROTOCOL_VERSION;
        op_common.code    = code;
        op_common.status  = status;
 
@@ -186,9 +186,9 @@ int usbip_net_recv_op_common(int sockfd, uint16_t *code)
 
        PACK_OP_COMMON(0, &op_common);
 
-       if (op_common.version != USBIP_VERSION) {
+       if (op_common.version != PROTOCOL_VERSION) {
                dbg("version mismatch: %d %d", op_common.version,
-                   USBIP_VERSION);
+                   PROTOCOL_VERSION);
                return -ERR_MISMATCH;
        }
 
diff --git a/drivers/staging/usbip/userspace/src/usbip_network.h 
b/drivers/staging/usbip/userspace/src/usbip_network.h
index d3c1b71..6a41fd8 100644
--- a/drivers/staging/usbip/userspace/src/usbip_network.h
+++ b/drivers/staging/usbip/userspace/src/usbip_network.h
@@ -14,6 +14,12 @@
 
 #include <stdint.h>
 
+/*
+ * Protocol version. Incremented only on non-backwards-compatible
+ * changes.
+ */
+#define PROTOCOL_VERSION 0x111
+
 extern int usbip_port;
 extern char *usbip_port_string;
 extern char *usbip_srp_password;
-- 
1.8.4.1

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