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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2017-06-23 09:10:11 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-07-01 16:49:27 -0400 |
| commit | 578079fab3f89eda73d7f3bb3bdfdf650ab1b8ec (patch) | |
| tree | 806db1510aab23d715e98a024dde42b680de6256 /drivers/scsi | |
| parent | f62f9ffdb5ef683ef8cffb43932fa72cc3713e94 (diff) | |
| download | linux-578079fab3f89eda73d7f3bb3bdfdf650ab1b8ec.tar.gz | |
scsi: qla2xxx: Protect access to qpair members with qpair->qp_lock
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>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_iocb.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index d40fa000615c..a36c485fae50 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -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++) { |