diff options
| author | John Garry <john.garry@huawei.com> | 2016-11-07 20:48:39 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-11-25 09:54:40 -0500 |
| commit | f696cc32b5984eb73f6b1ff81929ca9e5ea22d6d (patch) | |
| tree | 387bef15e11b8bd3ea913f6983596de20cf22298 /drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | |
| parent | 04708ff4c29522927de46424637e5a7c835a2e88 (diff) | |
scsi: hisi_sas: use atomic64_t for hisi_sas_device.running_req
Sometimes the value of hisi_sas_device.running_req
would go negative unless we have the check for
running_req >= 0 before trying to decrement.
This is because using running_req is not thread-safe.
As such, the value for running_req may be actually incorrect,
so use atomic64_t instead.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com>
Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hisi_sas/hisi_sas_v2_hw.c')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c index cda3baf9423d..e88113aff396 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -1728,8 +1728,8 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot, } out: - if (sas_dev && sas_dev->running_req) - sas_dev->running_req--; + if (sas_dev) + atomic64_dec(&sas_dev->running_req); hisi_sas_slot_task_free(hisi_hba, task, slot); sts = ts->stat; |