From 0a8c0c324e16e4848498309dbb2efd27b4c812a9 Mon Sep 17 00:00:00 2001
From: Uwe Hermann <uwe@hermann-uwe.de>
Date: Wed, 30 May 2012 23:15:23 +0200
Subject: [PATCH] sr: fx2lafw: Only check for correct major FW version.

Changes in the minor version number are OK, as those should never
contain any incompatible/API changes.
---
 hardware/fx2lafw/fx2lafw.c | 14 +++++++++-----
 hardware/fx2lafw/fx2lafw.h |  3 +--
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/hardware/fx2lafw/fx2lafw.c b/hardware/fx2lafw/fx2lafw.c
index 39f6c1f6..0ea4030d 100644
--- a/hardware/fx2lafw/fx2lafw.c
+++ b/hardware/fx2lafw/fx2lafw.c
@@ -251,11 +251,15 @@ static int fx2lafw_dev_open(int dev_index)
 			break;
 		}
 
-		if (vi.major != FX2LAFW_VERSION_MAJOR ||
-		    vi.minor != FX2LAFW_VERSION_MINOR) {
-			sr_err("fx2lafw: Expected firmware version %d.%d "
-			       "got %d.%d.", FX2LAFW_VERSION_MAJOR,
-			       FX2LAFW_VERSION_MINOR, vi.major, vi.minor);
+		/*
+		 * Changes in major version mean incompatible/API changes, so
+		 * bail out if we encounter an incompatible version.
+		 * Different minor versions are OK, they should be compatible.
+		 */
+		if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) {
+			sr_err("fx2lafw: Expected firmware version %d.x, "
+			       "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR,
+			       vi.major, vi.minor);
 			break;
 		}
 
diff --git a/hardware/fx2lafw/fx2lafw.h b/hardware/fx2lafw/fx2lafw.h
index 6f19b9ac..227854c8 100644
--- a/hardware/fx2lafw/fx2lafw.h
+++ b/hardware/fx2lafw/fx2lafw.h
@@ -31,8 +31,7 @@
 #define NUM_SIMUL_TRANSFERS	32
 #define MAX_EMPTY_TRANSFERS	(NUM_SIMUL_TRANSFERS * 2)
 
-#define FX2LAFW_VERSION_MAJOR	1
-#define FX2LAFW_VERSION_MINOR	0
+#define FX2LAFW_REQUIRED_VERSION_MAJOR	1
 
 /* 6 delay states of up to 256 clock ticks */
 #define MAX_SAMPLE_DELAY	(6 * 256)