From 5127cfad1d997863fa7e8f490c89293b4d0119e7 Mon Sep 17 00:00:00 2001
From: Miika Pekkarinen <miipekk@ihme.org>
Date: Tue, 30 May 2006 18:13:18 +0000
Subject: [PATCH] Fixed incorrect memory allocation bug with tagcache.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10023 a1c6a512-1295-4272-9138-f99709370657
---
 apps/tagcache.c            | 19 ++++++++++++++++++-
 firmware/common/dircache.c |  5 +++--
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/apps/tagcache.c b/apps/tagcache.c
index 98beba9b58..866b5c1444 100644
--- a/apps/tagcache.c
+++ b/apps/tagcache.c
@@ -1832,6 +1832,10 @@ static bool commit(void)
     int i, len, rc;
     int tmpfd;
     int masterfd;
+#ifdef HAVE_DIRCACHE
+    bool dircache_buffer_stolen = false;
+#endif
+    bool local_allocation = false;
     
     logf("committing tagcache");
     
@@ -1864,12 +1868,18 @@ static bool commit(void)
     }
 
     /* Try to steal every buffer we can :) */
+    if (tempbuf_size == 0)
+        local_allocation = true;
+    
 #ifdef HAVE_DIRCACHE
     if (tempbuf_size == 0)
     {
         /* Try to steal the dircache buffer. */
         tempbuf = dircache_steal_buffer(&tempbuf_size);
         tempbuf_size &= ~0x03;
+        
+        if (tempbuf_size > 0)
+            dircache_buffer_stolen = true;
     }
 #endif    
     
@@ -1956,9 +1966,16 @@ static bool commit(void)
     logf("tagcache committed");
     remove(TAGCACHE_FILE_TEMP);
     
+    if (local_allocation)
+    {
+        tempbuf = NULL;
+        tempbuf_size = 0;
+    }
+    
 #ifdef HAVE_DIRCACHE
     /* Rebuild the dircache, if we stole the buffer. */
-    dircache_build(0);
+    if (dircache_buffer_stolen)
+        dircache_build(0);
 #endif
 
 #ifdef HAVE_TC_RAMCACHE
diff --git a/firmware/common/dircache.c b/firmware/common/dircache.c
index e5ee77c311..e1b592f005 100644
--- a/firmware/common/dircache.c
+++ b/firmware/common/dircache.c
@@ -37,13 +37,12 @@
 #include "kernel.h"
 #include "usb.h"
 #include "file.h"
+#include "buffer.h"
 
 /* Queue commands. */
 #define DIRCACHE_BUILD 1
 #define DIRCACHE_STOP  2
 
-extern char *audiobuf;
-
 #define MAX_OPEN_DIRS 8
 DIRCACHED opendirs[MAX_OPEN_DIRS];
 
@@ -668,6 +667,8 @@ void dircache_init(void)
 {
     int i;
     
+    dircache_initialized = false;
+    
     memset(opendirs, 0, sizeof(opendirs));
     for (i = 0; i < MAX_OPEN_DIRS; i++)
     {