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scsi: ufs: core: Fix a possible use before initialization case 

In ufshcd_exec_dev_cmd(), if error happens before lrpb is initialized, then
we should bail out instead of letting trace record the error.

Link: https://lore.kernel.org/r/1623227044-22635-1-git-send-email-cang@codeaurora.org
Fixes: a45f937110 ("scsi: ufs: Optimize host lock on transfer requests send/compl paths")
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Can Guo 2021-06-09 01:24:00 -07:00 committed by Martin K. Petersen
parent 105424895c
commit eb783bb8bb
1 changed files with 2 additions and 3 deletions
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5
drivers/scsi/ufs/ufshcd.c
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@ -2980,7 +2980,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
WARN_ON(lrbp->cmd);
err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag);
if (unlikely(err))
goto out_put_tag;
goto out;
hba->dev_cmd.complete = &wait;
@ -2990,11 +2990,10 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
ufshcd_send_command(hba, tag);
err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout);
out:
ufshcd_add_query_upiu_trace(hba, err ? UFS_QUERY_ERR : UFS_QUERY_COMP,
(struct utp_upiu_req *)lrbp->ucd_rsp_ptr);
out_put_tag:
out:
blk_put_request(req);
out_unlock:
up_read(&hba->clk_scaling_lock);