diff options
| author | Douglas Gilbert <dgilbert@interlog.com> | 2022-01-09 04:28:46 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-01-25 08:25:05 +0300 |
| commit | d9d23a5a34bdd2ac6ba477e58794c577a1e93dd5 (patch) | |
| tree | e582293da4cd150c7e7c18d0cfc2fb68ab53f722 /drivers/scsi/scsi_debug.c | |
| parent | 2aad3cd8537033cd34f70294a23f54623ffe9c1b (diff) | |
| download | linux-d9d23a5a34bdd2ac6ba477e58794c577a1e93dd5.tar.xz | |
scsi: scsi_debug: Strengthen defer_t accesses
Use READ_ONCE() and WRITE_ONCE() macros when accessing the
sdebug_defer::defer_t value.
Link: https://lore.kernel.org/r/20220109012853.301953-3-dgilbert@interlog.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 24f3905f054f..40f698e331ee 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4782,7 +4782,7 @@ static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) return; } spin_lock_irqsave(&sqp->qc_lock, iflags); - sd_dp->defer_t = SDEB_DEFER_NONE; + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); sqcp = &sqp->qc_arr[qc_idx]; scp = sqcp->a_cmnd; if (unlikely(scp == NULL)) { @@ -5103,8 +5103,8 @@ static bool stop_queued_cmnd(struct scsi_cmnd *cmnd) sqcp->a_cmnd = NULL; sd_dp = sqcp->sd_dp; if (sd_dp) { - l_defer_t = sd_dp->defer_t; - sd_dp->defer_t = SDEB_DEFER_NONE; + l_defer_t = READ_ONCE(sd_dp->defer_t); + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); } else l_defer_t = SDEB_DEFER_NONE; spin_unlock_irqrestore(&sqp->qc_lock, iflags); @@ -5145,8 +5145,8 @@ static void stop_all_queued(bool done_with_no_conn) sqcp->a_cmnd = NULL; sd_dp = sqcp->sd_dp; if (sd_dp) { - l_defer_t = sd_dp->defer_t; - sd_dp->defer_t = SDEB_DEFER_NONE; + l_defer_t = READ_ONCE(sd_dp->defer_t); + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); } else l_defer_t = SDEB_DEFER_NONE; spin_unlock_irqrestore(&sqp->qc_lock, iflags); @@ -5627,7 +5627,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, sd_dp->sqa_idx = sqp - sdebug_q_arr; sd_dp->qc_idx = k; } - sd_dp->defer_t = SDEB_DEFER_POLL; + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); spin_unlock_irqrestore(&sqp->qc_lock, iflags); } else { if (!sd_dp->init_hrt) { @@ -5639,7 +5639,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, sd_dp->sqa_idx = sqp - sdebug_q_arr; sd_dp->qc_idx = k; } - sd_dp->defer_t = SDEB_DEFER_HRT; + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT); /* schedule the invocation of scsi_done() for a later time */ hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); } @@ -5658,7 +5658,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, sd_dp->sqa_idx = sqp - sdebug_q_arr; sd_dp->qc_idx = k; } - sd_dp->defer_t = SDEB_DEFER_POLL; + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); spin_unlock_irqrestore(&sqp->qc_lock, iflags); } else { if (!sd_dp->init_wq) { @@ -5668,7 +5668,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, sd_dp->qc_idx = k; INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); } - sd_dp->defer_t = SDEB_DEFER_WQ; + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ); schedule_work(&sd_dp->ew.work); } if (sdebug_statistics) @@ -7436,7 +7436,7 @@ static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) queue_num, qc_idx, __func__); break; } - if (sd_dp->defer_t == SDEB_DEFER_POLL) { + if (READ_ONCE(sd_dp->defer_t) == SDEB_DEFER_POLL) { if (kt_from_boot < sd_dp->cmpl_ts) continue; @@ -7470,7 +7470,7 @@ static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) else atomic_set(&retired_max_queue, k + 1); } - sd_dp->defer_t = SDEB_DEFER_NONE; + WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); spin_unlock_irqrestore(&sqp->qc_lock, iflags); scsi_done(scp); /* callback to mid level */ spin_lock_irqsave(&sqp->qc_lock, iflags); |