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scsi: ufs: core: Fix wrong Task Tag used in task management request UPIUs
In __ufshcd_issue_tm_cmd(), it is not correct to use hba->nutrs + req->tag
as the Task Tag in a TMR UPIU. Directly use req->tag as the Task Tag.
Fixes: e293313262
("scsi: ufs: Fix broken task management command implementation")
Link: https://lore.kernel.org/r/1617262750-4864-3-git-send-email-cang@codeaurora.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
parent
1235fc569e
commit
4b42d557a8
1 changed files with 13 additions and 17 deletions
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@ -6386,38 +6386,34 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
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DECLARE_COMPLETION_ONSTACK(wait);
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struct request *req;
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unsigned long flags;
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int free_slot, task_tag, err;
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int task_tag, err;
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/*
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* Get free slot, sleep if slots are unavailable.
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* Even though we use wait_event() which sleeps indefinitely,
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* the maximum wait time is bounded by %TM_CMD_TIMEOUT.
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* blk_get_request() is used here only to get a free tag.
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*/
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req = blk_get_request(q, REQ_OP_DRV_OUT, 0);
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if (IS_ERR(req))
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return PTR_ERR(req);
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req->end_io_data = &wait;
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free_slot = req->tag;
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WARN_ON_ONCE(free_slot < 0 || free_slot >= hba->nutmrs);
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ufshcd_hold(hba, false);
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spin_lock_irqsave(host->host_lock, flags);
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task_tag = hba->nutrs + free_slot;
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blk_mq_start_request(req);
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task_tag = req->tag;
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treq->req_header.dword_0 |= cpu_to_be32(task_tag);
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memcpy(hba->utmrdl_base_addr + free_slot, treq, sizeof(*treq));
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ufshcd_vops_setup_task_mgmt(hba, free_slot, tm_function);
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memcpy(hba->utmrdl_base_addr + task_tag, treq, sizeof(*treq));
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ufshcd_vops_setup_task_mgmt(hba, task_tag, tm_function);
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/* send command to the controller */
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__set_bit(free_slot, &hba->outstanding_tasks);
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__set_bit(task_tag, &hba->outstanding_tasks);
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/* Make sure descriptors are ready before ringing the task doorbell */
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wmb();
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ufshcd_writel(hba, 1 << free_slot, REG_UTP_TASK_REQ_DOOR_BELL);
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ufshcd_writel(hba, 1 << task_tag, REG_UTP_TASK_REQ_DOOR_BELL);
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/* Make sure that doorbell is committed immediately */
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wmb();
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@ -6437,24 +6433,24 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
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ufshcd_add_tm_upiu_trace(hba, task_tag, UFS_TM_ERR);
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dev_err(hba->dev, "%s: task management cmd 0x%.2x timed-out\n",
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__func__, tm_function);
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if (ufshcd_clear_tm_cmd(hba, free_slot))
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dev_WARN(hba->dev, "%s: unable clear tm cmd (slot %d) after timeout\n",
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__func__, free_slot);
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if (ufshcd_clear_tm_cmd(hba, task_tag))
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dev_WARN(hba->dev, "%s: unable to clear tm cmd (slot %d) after timeout\n",
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__func__, task_tag);
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err = -ETIMEDOUT;
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} else {
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err = 0;
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memcpy(treq, hba->utmrdl_base_addr + free_slot, sizeof(*treq));
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memcpy(treq, hba->utmrdl_base_addr + task_tag, sizeof(*treq));
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ufshcd_add_tm_upiu_trace(hba, task_tag, UFS_TM_COMP);
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}
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spin_lock_irqsave(hba->host->host_lock, flags);
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__clear_bit(free_slot, &hba->outstanding_tasks);
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__clear_bit(task_tag, &hba->outstanding_tasks);
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spin_unlock_irqrestore(hba->host->host_lock, flags);
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ufshcd_release(hba);
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blk_put_request(req);
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ufshcd_release(hba);
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return err;
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}
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