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[SCSI] iscsi_tcp: hold lock during data rsp processing

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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>
This commit is contained in:
Mike Christie 2007-12-13 12:43:40 -06:00 committed by James Bottomley
parent 66bbe0ce11
commit 4545a88fc1
1 changed files with 6 additions and 8 deletions
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14
drivers/scsi/iscsi_tcp.c
View file

@ -641,13 +641,11 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
}
/* 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 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
conn->r2t_pdus_cnt++;
iscsi_requeue_ctask(ctask);
spin_unlock(&session->lock);
return 0;
}
@ -764,7 +758,9 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
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 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
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: