fix：修复函数返回错误等问题

Signed-off-by: zhangdengyu <zhangdengyu2@huawei.com>

fs/vfs/bcache/src/bcache.c

@@ -583,9 +583,6 @@ static OsBcacheBlock *AllocNewBlock(OsBcache *bc, BOOL read, UINT64 num)
 
     if (prefer->used) {
         MergeSyncBlocks(bc, prefer);
-    }
-
-    if (prefer->used) {
         BcacheSyncBlock(bc, prefer);
         DelBlock(bc, prefer);
     }

fs/vfs/include/vnode.h

@@ -160,7 +160,7 @@ typedef int VfsHashCmp(struct Vnode *vnode, void *arg);
 
 int VnodesInit(void);
 int VnodeDevInit(void);
-int VnodeAlloc(struct VnodeOps *vop, struct Vnode **vnode);
+int VnodeAlloc(struct VnodeOps *vop, struct Vnode **newVnode);
 int VnodeFree(struct Vnode *vnode);
 int VnodeLookup(const char *path, struct Vnode **vnode, uint32_t flags);
 int VnodeLookupFullpath(const char *fullpath, struct Vnode **vnode, uint32_t flags);

fs/vfs/vfs_cmd/vfs_shellcmd.c

@@ -761,11 +761,6 @@ static int os_shell_cmd_do_rmdir(const char *pathname)
         }
         if (strcmp(dirent->d_name, "..") && strcmp(dirent->d_name, ".")) {
             size_t fullpath_buf_size = strlen(pathname) + strlen(dirent->d_name) + SEPARATOR_EOF_LEN;
-            if (fullpath_buf_size <= 0) {
-                PRINTK("buffer size is invalid!\n");
-                (void)closedir(d);
-                return -1;
-            }
             fullpath = (char *)malloc(fullpath_buf_size);
             if (fullpath == NULL) {
                 PRINTK("malloc failure!\n");

fs/vfs/vnode.c

@@ -260,7 +260,7 @@ int VnodeDrop(void)
 static char *NextName(char *pos, uint8_t *len)
 {
     char *name = NULL;
-    while (*pos != 0 && *pos == '/') {
+    while (*pos == '/') {
         pos++;
     }
     if (*pos == '\0') {