AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-25 09:30:53 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

scsi: qla2xxx: Protect access to qpair members with qpair->qp_lock

Browse Source 
In qla2xx_start_scsi_mq() and qla2xx_dif_start_scsi_mq() we grab the
qpair->qp_lock but do access members of the qpair before having the lock.
Re-order the locking sequence to have all read and write access to qpair
members under the qpair->qp_lock.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Johannes Thumshirn 2017-06-23 09:10:11 +02:00 committed by Martin K. Petersen
parent f62f9ffdb5
commit 578079fab3
1 changed files with 13 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/scsi/qla2xxx/qla_iocb.c
View File

@ -1770,6 +1770,9 @@ qla2xxx_start_scsi_mq(srb_t *sp)
struct qla_hw_data *ha = vha->hw;
struct qla_qpair *qpair = sp->qpair;
/* Acquire qpair specific lock */
spin_lock_irqsave(&qpair->qp_lock, flags);
/* Setup qpair pointers */
rsp = qpair->rsp;
req = qpair->req;
@ -1779,15 +1782,14 @@ qla2xxx_start_scsi_mq(srb_t *sp)
/* Send marker if required */
if (vha->marker_needed != 0) {
if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS)
if (__qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS) {
spin_unlock_irqrestore(&qpair->qp_lock, flags);
return QLA_FUNCTION_FAILED;
}
vha->marker_needed = 0;
}
/* Acquire qpair specific lock */
spin_lock_irqsave(&qpair->qp_lock, flags);
/* Check for room in outstanding command list. */
handle = req->current_outstanding_cmd;
for (index = 1; index < req->num_outstanding_cmds; index++) {
@ -1942,6 +1944,8 @@ qla2xxx_dif_start_scsi_mq(srb_t *sp)
return qla2xxx_start_scsi_mq(sp);
}
spin_lock_irqsave(&qpair->qp_lock, flags);
/* Setup qpair pointers */
rsp = qpair->rsp;
req = qpair->req;
@ -1951,15 +1955,14 @@ qla2xxx_dif_start_scsi_mq(srb_t *sp)
/* Send marker if required */
if (vha->marker_needed != 0) {
if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS)
if (__qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS) {
spin_unlock_irqrestore(&qpair->qp_lock, flags);
return QLA_FUNCTION_FAILED;
}
vha->marker_needed = 0;
}
/* Acquire ring specific lock */
spin_lock_irqsave(&qpair->qp_lock, flags);
/* Check for room in outstanding command list. */
handle = req->current_outstanding_cmd;
for (index = 1; index < req->num_outstanding_cmds; index++) {