From f4258152cf378d8f17f8d204be3a70fabcb05e99 Mon Sep 17 00:00:00 2001
From: FakuFaku <fakufaku@gmail.com>
Date: Thu, 8 Nov 2012 09:12:10 +0100
Subject: [PATCH] In SD.init, when already open, close root directory before
 trying to init.

---
 libraries/SD/SD.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libraries/SD/SD.cpp b/libraries/SD/SD.cpp
index c746809b6ec..9a966e8466d 100644
--- a/libraries/SD/SD.cpp
+++ b/libraries/SD/SD.cpp
@@ -340,6 +340,13 @@ boolean SDClass::begin(uint8_t csPin) {
     Return true if initialization succeeds, false otherwise.
 
    */
+
+  /* before trying to initialize the card, close the root if open */
+  /* this fixes a bug when we turn off the SD card to save power  */
+  if (root.isOpen())
+    if (!root.close())
+      return false;
+
   return card.init(SPI_HALF_SPEED, csPin) &&
          volume.init(card) &&
          root.openRoot(volume);