[SCSI] iscsi_tcp: hold lock during data rsp processing
iscsi_data_rsp needs to hold the sesison lock when it calls
iscsi_update_cmdsn.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 84c4a50..edebdf2 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -641,13 +641,11 @@
}
/* fill-in new R2T associated with the task */
- spin_lock(&session->lock);
iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr);
if (!ctask->sc || session->state != ISCSI_STATE_LOGGED_IN) {
printk(KERN_INFO "iscsi_tcp: dropping R2T itt %d in "
"recovery...\n", ctask->itt);
- spin_unlock(&session->lock);
return 0;
}
@@ -660,7 +658,6 @@
printk(KERN_ERR "iscsi_tcp: invalid R2T with zero data len\n");
__kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
sizeof(void*));
- spin_unlock(&session->lock);
return ISCSI_ERR_DATALEN;
}
@@ -676,7 +673,6 @@
r2t->data_offset, scsi_bufflen(ctask->sc));
__kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
sizeof(void*));
- spin_unlock(&session->lock);
return ISCSI_ERR_DATALEN;
}
@@ -690,8 +686,6 @@
conn->r2t_pdus_cnt++;
iscsi_requeue_ctask(ctask);
- spin_unlock(&session->lock);
-
return 0;
}
@@ -764,7 +758,9 @@
switch(opcode) {
case ISCSI_OP_SCSI_DATA_IN:
ctask = session->cmds[itt];
+ spin_lock(&conn->session->lock);
rc = iscsi_data_rsp(conn, ctask);
+ spin_unlock(&conn->session->lock);
if (rc)
return rc;
if (tcp_conn->in.datalen) {
@@ -806,9 +802,11 @@
ctask = session->cmds[itt];
if (ahslen)
rc = ISCSI_ERR_AHSLEN;
- else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE)
+ else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) {
+ spin_lock(&session->lock);
rc = iscsi_r2t_rsp(conn, ctask);
- else
+ spin_unlock(&session->lock);
+ } else
rc = ISCSI_ERR_PROTO;
break;
case ISCSI_OP_LOGIN_RSP:
