From 3e178f3ecfcf91a258e832b0f0843a4cfd9059ac Mon Sep 17 00:00:00 2001
From: Xiang Chen <chenxiang66@hisilicon.com>
Date: Mon, 24 Sep 2018 23:06:31 +0800
Subject: [PATCH] scsi: hisi_sas: Free slot later in slot_complete_vx_hw()
If an SSP/SMP IO times out, it may be actually in reality be
simultaneously processing completion of the slot in
slot_complete_vx_hw().
Then if the slot is freed in slot_complete_vx_hw() (this IPTT is freed
and it may be re-used by other slot), and we may abort the wrong slot in
hisi_sas_abort_task().
So to solve the issue, free the slot after the check of
SAS_TASK_STATE_ABORTED in slot_complete_vx_hw().
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 2 +-
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 2 +-
2 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 9c5c5a601332ed..67134b49a9b9c3 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -2483,7 +2483,6 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
}
out:
- hisi_sas_slot_task_free(hisi_hba, task, slot);
sts = ts->stat;
spin_lock_irqsave(&task->task_state_lock, flags);
if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
@@ -2493,6 +2492,7 @@ out:
}
task->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&task->task_state_lock, flags);
+ hisi_sas_slot_task_free(hisi_hba, task, slot);
if (!is_internal && (task->task_proto != SAS_PROTOCOL_SMP)) {
spin_lock_irqsave(&device->done_lock, flags);
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 08b503e274b818..3995ff657a7241 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -1751,7 +1751,6 @@ slot_complete_v3_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
}
out:
- hisi_sas_slot_task_free(hisi_hba, task, slot);
sts = ts->stat;
spin_lock_irqsave(&task->task_state_lock, flags);
if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
@@ -1761,6 +1760,7 @@ out:
}
task->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&task->task_state_lock, flags);
+ hisi_sas_slot_task_free(hisi_hba, task, slot);
if (!is_internal && (task->task_proto != SAS_PROTOCOL_SMP)) {
spin_lock_irqsave(&device->done_lock, flags);
--
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