cifs: Fix the smb1 readv callback to correctly call netfs

Fix cifs_readv_callback() to call netfs_read_subreq_terminated() rather
than queuing the subrequest work item (which is unset). Also call the
I/O progress tracepoint.

cc: Jeff Layton <[e-mail]>
cc: [e-mail]
cc: [e-mail]
cc: [e-mail]
Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item")
Reported-by: Jean-Christophe Guillain <[e-mail]>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219793
Tested-by: Jean-Christophe Guillain <[e-mail]>
Tested-by: Pali Rohár <[e-mail]>
Reviewed-by: Paulo Alcantara (Red Hat) <[e-mail]>
Signed-off-by: David Howells <[e-mail]>
Signed-off-by: Steve French <[e-mail]>

fs/smb/client/cifssmb.c

···
 	rdata->credits.value = 0;
 	rdata->subreq.error = rdata->result;
 	rdata->subreq.transferred += rdata->got_bytes;
-	queue_work(cifsiod_wq, &rdata->subreq.work);
+	trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_progress);
+	netfs_read_subreq_terminated(&rdata->subreq);
 	release_mid(mid);
 	add_credits(server, &credits, 0);
 }