2 files changed, 23 insertions, 10 deletions

diff --git a/backends/fs/amigaos4/amigaos4-fs.cpp b/backends/fs/amigaos4/amigaos4-fs.cpp
index fe388c2a6e..bd8bf1978a 100644
--- a/backends/fs/amigaos4/amigaos4-fs.cpp
+++ b/backends/fs/amigaos4/amigaos4-fs.cpp
@@ -81,6 +81,7 @@ AmigaOSFilesystemNode::AmigaOSFilesystemNode(const Common::String &p) {
 	_sDisplayName = ::lastPathComponent(_sPath);
 	_pFileLock = 0;
 	_bIsDirectory = false;
+	_bIsValid = false;
 
 	// Check whether the node exists and if it is a directory
 	struct ExamineData * pExd = IDOS->ExamineObjectTags(EX_StringNameInput,_sPath.c_str(),TAG_END);
@@ -305,12 +306,6 @@ bool AmigaOSFilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, b
 AbstractFSNode *AmigaOSFilesystemNode::getParent() const {
 	ENTER();
 
-	if (!_bIsDirectory) {
-		debug(6, "Not a directory");
-		LEAVE();
-		return 0;
-	}
-
 	if (_pFileLock == 0) {
 		debug(6, "Root node");
 		LEAVE();
@@ -332,19 +327,25 @@ AbstractFSNode *AmigaOSFilesystemNode::getParent() const {
 }
 
 bool AmigaOSFilesystemNode::isReadable() const {
+	if (!_bIsValid)
+		return false;
+
 	// Regular RWED protection flags are low-active or inverted, thus the negation.
 	// moreover pseudo root filesystem (null _pFileLock) is readable whatever the
 	// protection says
-	bool readable = !(_nProt & EXDF_READ) || _pFileLock == 0;
+	bool readable = !(_nProt & EXDF_OTR_READ) || _pFileLock == 0;
 
 	return readable;
 }
 
 bool AmigaOSFilesystemNode::isWritable() const {
+	if (!_bIsValid)
+		return false;
+
 	// Regular RWED protection flags are low-active or inverted, thus the negation.
 	// moreover pseudo root filesystem (null _pFileLock) is never writable whatever
 	// the protection says (because of the pseudo nature)
-	bool writable = !(_nProt & EXDF_WRITE) && _pFileLock !=0;
+	bool writable = !(_nProt & EXDF_OTR_WRITE) && _pFileLock !=0;
 
 	return writable;
 }
@@ -367,8 +368,14 @@ AbstractFSList AmigaOSFilesystemNode::listVolumes() const {
 	dosList = IDOS->NextDosEntry(dosList, LDF_VOLUMES);
 	while (dosList) {
 		if (dosList->dol_Type == DLT_VOLUME &&
-			dosList->dol_Name &&
-			dosList->dol_Task) {
+			dosList->dol_Name) {
+
+			// Original was
+			// dosList->dol_Name &&
+			// dosList->dol_Task) {
+			// which errored using SDK 53.24 with a 'struct dosList' has no member called 'dol_Task'
+			// I removed dol_Task because it's not used anywhere else
+			// and it neither brought up further errors nor crashes or regressions.
 
 			// Copy name to buffer
 			IDOS->CopyStringBSTRToC(dosList->dol_Name, buffer, MAXPATHLEN);
diff --git a/backends/fs/amigaos4/amigaos4-fs.h b/backends/fs/amigaos4/amigaos4-fs.h
index c5ca61476f..7ce9981479 100644
--- a/backends/fs/amigaos4/amigaos4-fs.h
+++ b/backends/fs/amigaos4/amigaos4-fs.h
@@ -43,7 +43,13 @@
  */
 class AmigaOSFilesystemNode : public AbstractFSNode {
 protected:
+	/**
+	 * The main file lock.
+	 * If this is NULL but _bIsValid is true, then this Node references
+	 * the virtual filesystem root.
+	 */
 	BPTR _pFileLock;
+
 	Common::String _sDisplayName;
 	Common::String _sPath;
 	bool _bIsDirectory;