From 3819d93b4e41c80c4849697048d40010ae282c99 Mon Sep 17 00:00:00 2001
From: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
Date: Fri, 22 Oct 2021 10:45:13 -0300
Subject: [PATCH] fs/mount: Properly handle missing FS on the supported list

Instead of reporting the failure to find a given FS, nx_mount was
reporting a failure to find the block driver, even when the actual block
driver exists.

Signed-off-by: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
---
 fs/mount/fs_mount.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/fs/mount/fs_mount.c b/fs/mount/fs_mount.c
index 39bb8da53b..b0c7d2eb54 100644
--- a/fs/mount/fs_mount.c
+++ b/fs/mount/fs_mount.c
@@ -266,11 +266,9 @@ int nx_mount(FAR const char *source, FAR const char *target,
              FAR const void *data)
 {
 #if defined(BDFS_SUPPORT) || defined(MDFS_SUPPORT) || defined(NODFS_SUPPORT)
-#if defined(BDFS_SUPPORT) || defined(MDFS_SUPPORT)
   FAR struct inode *drvr_inode = NULL;
-#endif
   FAR struct inode *mountpt_inode;
-  FAR const struct mountpt_operations *mops;
+  FAR const struct mountpt_operations *mops = NULL;
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
   struct inode_search_s desc;
 #endif
@@ -283,13 +281,14 @@ int nx_mount(FAR const char *source, FAR const char *target,
 
   /* Find the specified filesystem. Try the block driver filesystems first */
 
-#ifdef BDFS_SUPPORT
   if (source != NULL &&
       find_blockdriver(source, mountflags, &drvr_inode) >= 0)
     {
       /* Find the block based file system */
 
+#ifdef BDFS_SUPPORT
       mops = mount_findfs(g_bdfsmap, filesystemtype);
+#endif /* BDFS_SUPPORT */
       if (mops == NULL)
         {
           ferr("ERROR: Failed to find block based file system %s\n",
@@ -299,14 +298,14 @@ int nx_mount(FAR const char *source, FAR const char *target,
           goto errout_with_inode;
         }
     }
-  else
-#endif /* BDFS_SUPPORT */
-#ifdef MDFS_SUPPORT
-  if (source != NULL && (ret = find_mtddriver(source, &drvr_inode)) >= 0)
+  else if (source != NULL &&
+           (ret = find_mtddriver(source, &drvr_inode)) >= 0)
     {
       /* Find the MTD based file system */
 
+#ifdef MDFS_SUPPORT
       mops = mount_findfs(g_mdfsmap, filesystemtype);
+#endif /* MDFS_SUPPORT */
       if (mops == NULL)
         {
           ferr("ERROR: Failed to find MTD based file system %s\n",
@@ -317,7 +316,6 @@ int nx_mount(FAR const char *source, FAR const char *target,
         }
     }
   else
-#endif /* MDFS_SUPPORT */
 #ifdef NODFS_SUPPORT
   if ((mops = mount_findfs(g_nonbdfsmap, filesystemtype)) != NULL)
     {