fs/9p: Invalidate dentry if inode type change detected in cached mode

This is an extension of the last commit to cached mode as well.  While
server-side changes when using cached mode is not expected, when it does
happen we can get things like -EOPNOTSUPP.  With this change at least when
we realize the inode has updated (for example after a `touch` on the
client), we can get a new one.

Signed-off-by: Tingmao Wang <[email protected]>
Message-ID: <01afd3c77d5cda181780dc931baa8f3fc54562c8.1743956147.git.m@maowtm.org>
Signed-off-by: Dominique Martinet <[email protected]>

Author: micromaomao

fs/9p/vfs_dentry.c

@@ -97,7 +97,7 @@ static int __v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 
 		if (retval == -ENOENT)
 			return 0;
-		if (!cached && v9inode->cache_validity & V9FS_INO_INVALID_ATTR)
+		if (v9inode->cache_validity & V9FS_INO_INVALID_ATTR)
 			return 0;
 		if (retval < 0)
 			return retval;