smb: client: get rid of d_drop() in cifs_do_rename()

JIRA: https://issues.redhat.com/browse/RHEL-124956

commit 72ed55b
Author: Paulo Alcantara <pc@manguebit.org>
Date:   Wed Oct 22 21:11:01 2025 -0300

    smb: client: get rid of d_drop() in cifs_do_rename()

    There is no need to force a lookup by unhashing the moved dentry after
    successfully renaming the file on server.  The file metadata will be
    re-fetched from server, if necessary, in the next call to
    ->d_revalidate() anyways.

    Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
    Reviewed-by: David Howells <dhowells@redhat.com>
    Cc: stable@vger.kernel.org
    Cc: linux-cifs@vger.kernel.org
    Signed-off-by: Steve French <stfrench@microsoft.com>

Signed-off-by: Paulo Alcantara <paalcant@redhat.com>

Author: pcacjr

fs/smb/client/inode.c

@@ -2482,11 +2482,8 @@ cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
 	}
 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
 do_rename_exit:
-	if (rc == 0) {
+	if (rc == 0)
 		d_move(from_dentry, to_dentry);
-		/* Force a new lookup */
-		d_drop(from_dentry);
-	}
 	cifs_put_tlink(tlink);
 	return rc;
 }