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[SCSI] iscsi: fix run list corruption 

from davidw@netapp.com:

We must grab the session lock when modifying the running lists.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Mike Christie 2006-05-30 00:37:22 -05:00 committed by James Bottomley
parent 67a611149b
commit 994442e807
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/libiscsi.c
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@ -552,8 +552,10 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
if (unlikely(__kfifo_len(conn->immqueue))) {
while (__kfifo_get(conn->immqueue, (void*)&conn->mtask,
sizeof(void*))) {
spin_lock_bh(&conn->session->lock);
list_add_tail(&conn->mtask->running,
&conn->mgmt_run_list);
spin_unlock_bh(&conn->session->lock);
if (tt->xmit_mgmt_task(conn, conn->mtask))
goto again;
}
@ -568,8 +570,10 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
* iscsi tcp may readd the task to the xmitqueue to send
* write data
*/
spin_lock_bh(&conn->session->lock);
if (list_empty(&conn->ctask->running))
list_add_tail(&conn->ctask->running, &conn->run_list);
spin_unlock_bh(&conn->session->lock);
if (tt->xmit_cmd_task(conn, conn->ctask))
goto again;
}
@ -580,8 +584,10 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
if (unlikely(__kfifo_len(conn->mgmtqueue))) {
while (__kfifo_get(conn->mgmtqueue, (void*)&conn->mtask,
sizeof(void*))) {
spin_lock_bh(&conn->session->lock);
list_add_tail(&conn->mtask->running,
&conn->mgmt_run_list);
spin_unlock_bh(&conn->session->lock);
if (tt->xmit_mgmt_task(conn, conn->mtask))
goto again;
}