[PATCH v9 9/9] scsi: ufs: Properly release resources if a task is aborted successfully

[Can Guo]

In current UFS task abort hook, namely ufshcd_abort(), if a task is
aborted successfully, clock scaling busy time statistics is not updated
and, most important, clk_gating.active_reqs is not decreased, which makes
clk_gating.active_reqs stay above zero forever, thus clock gating would
never happen. To fix it, instead of releasing resources "mannually", use
the existing func __ufshcd_transfer_req_compl(). This can also eliminate
racing of scsi_dma_unmap() from the real completion in IRQ handler path.

Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
CC: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
---
 drivers/scsi/ufs/ufshcd.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index d7d2758..9a48389 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6635,11 +6635,8 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 		goto out;
 	}
 
-	scsi_dma_unmap(cmd);
-
 	spin_lock_irqsave(host->host_lock, flags);
-	ufshcd_outstanding_req_clear(hba, tag);
-	hba->lrb[tag].cmd = NULL;
+	__ufshcd_transfer_req_compl(hba, (1UL << tag));
 	spin_unlock_irqrestore(host->host_lock, flags);
 
 out:
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.