---

yaml --- r: 298158 b: refs/heads/master c: 5fbabf3 h: refs/heads/master v: v3
git-mirror · Mar 26, 2012 · 3610af2 · 3610af2
1 parent 712e952
commit 3610af2
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 876fe76d793d03077eb61ba3afab4a383f46c554
+refs/heads/master: 5fbabf3f45a15c2b39170980cee01368138f4d79
diff --git a/trunk/drivers/mtd/maps/l440gx.c b/trunk/drivers/mtd/maps/l440gx.c
@@ -27,17 +27,21 @@ static struct mtd_info *mymtd;
 
 
 /* Is this really the vpp port? */
+static DEFINE_SPINLOCK(l440gx_vpp_lock);
+static int l440gx_vpp_refcnt;
 static void l440gx_set_vpp(struct map_info *map, int vpp)
 {
-	unsigned long l;
+	unsigned long flags;
 
-	l = inl(VPP_PORT);
+	spin_lock_irqsave(&l440gx_vpp_lock, flags);
 	if (vpp) {
-		l |= 1;
+		if (++l440gx_vpp_refcnt == 1)   /* first nested 'on' */
+			outl(inl(VPP_PORT) | 1, VPP_PORT);
 	} else {
-		l &= ~1;
+		if (--l440gx_vpp_refcnt == 0)   /* last nested 'off' */
+			outl(inl(VPP_PORT) & ~1, VPP_PORT);
 	}
-	outl(l, VPP_PORT);
+	spin_unlock_irqrestore(&l440gx_vpp_lock, flags);
 }
 
 static struct map_info l440gx_map = {