From 3df1056ee50d09c97e421896a698f74d367282ef Mon Sep 17 00:00:00 2001 From: Xiang Chen Date: Mon, 24 Sep 2018 23:06:31 +0800 Subject: [PATCH 04/31] scsi: hisi_sas: Free slot later in slot_complete_vx_hw() Origin: https://git.kernel.org/linus/3e178f3ecfcf91a258e832b0f0843a4cfd9059ac 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 Signed-off-by: John Garry Signed-off-by: Martin K. Petersen --- 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(-) Index: linux/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c =================================================================== --- linux.orig/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ linux/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -2481,7 +2481,6 @@ slot_complete_v2_hw(struct hisi_hba *his } 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) { @@ -2491,6 +2490,7 @@ 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); Index: linux/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c =================================================================== --- linux.orig/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ linux/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -1749,7 +1749,6 @@ slot_complete_v3_hw(struct hisi_hba *his } 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) { @@ -1759,6 +1758,7 @@ 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);