diff options
| author | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-02-20 06:17:58 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-02-23 05:31:20 +0300 |
| commit | 7fb23a785ba38dea907323a039123f231195b297 (patch) | |
| tree | afa6f63f72700d112f405b588bba3ddadc293fbf /drivers/scsi/pm8001/pm8001_sas.c | |
| parent | 7e6b7e740addcea450041b5be8e42f0a4ceece0f (diff) | |
| download | linux-7fb23a785ba38dea907323a039123f231195b297.tar.xz | |
scsi: pm8001: Fix tag values handling
The function pm8001_tag_alloc() determines free tags using the function
find_first_zero_bit() which can return 0 when the first bit of the bitmap
being inspected is 0. As such, tag 0 is a valid tag value that should not
be dismissed as invalid. Fix the functions pm8001_work_fn(),
mpi_sata_completion(), pm8001_mpi_task_abort_resp() and
pm8001_open_reject_retry() to not dismiss 0 tags as invalid.
The value 0xffffffff is used for invalid tags for unused ccb information
structures. Add the macro definition PM8001_INVALID_TAG to define this
value.
Link: https://lore.kernel.org/r/20220220031810.738362-20-damien.lemoal@opensource.wdc.com
Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index f5678be4c17b..f409dfa049c0 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -553,7 +553,7 @@ void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha, task->lldd_task = NULL; ccb->task = NULL; - ccb->ccb_tag = 0xFFFFFFFF; + ccb->ccb_tag = PM8001_INVALID_TAG; ccb->open_retry = 0; pm8001_tag_free(pm8001_ha, ccb_idx); } @@ -831,9 +831,11 @@ void pm8001_open_reject_retry( struct task_status_struct *ts; struct pm8001_device *pm8001_dev; unsigned long flags1; - u32 tag; struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i]; + if (ccb->ccb_tag == PM8001_INVALID_TAG) + continue; + pm8001_dev = ccb->device; if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)) continue; @@ -845,9 +847,6 @@ void pm8001_open_reject_retry( continue; } else if (pm8001_dev != device_to_close) continue; - tag = ccb->ccb_tag; - if (!tag || (tag == 0xFFFFFFFF)) - continue; task = ccb->task; if (!task || !task->task_done) continue; @@ -867,11 +866,11 @@ void pm8001_open_reject_retry( & SAS_TASK_STATE_ABORTED))) { spin_unlock_irqrestore(&task->task_state_lock, flags1); - pm8001_ccb_task_free(pm8001_ha, task, ccb, tag); + pm8001_ccb_task_free(pm8001_ha, task, ccb, ccb->ccb_tag); } else { spin_unlock_irqrestore(&task->task_state_lock, flags1); - pm8001_ccb_task_free(pm8001_ha, task, ccb, tag); + pm8001_ccb_task_free(pm8001_ha, task, ccb, ccb->ccb_tag); mb();/* in order to force CPU ordering */ spin_unlock_irqrestore(&pm8001_ha->lock, flags); task->task_done(task); |