[dfs] add re-initial check.

2018-07-02 16:57:19 +08:00 · 2018-07-02 16:57:19 +08:00 · f3fc141f5f
parent 000fe93b9f
commit f3fc141f5f
1 changed files with 8 additions and 0 deletions
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@ -55,8 +55,16 @@ static int  fd_alloc(struct dfs_fdtable *fdt, int startfd);
 /**
 * this function will initialize device file system.
 */
+static volatile uint8_t init_ok = 0;
 int dfs_init(void)
 {
+    if(init_ok)
+    {
+        rt_kprintf("dfs already init.\n");
+        return 0;        
+    }
+    init_ok = 1;	
+
    /* clear filesystem operations table */
    memset((void *)filesystem_operation_table, 0, sizeof(filesystem_operation_table));
    /* clear filesystem table */