scsi: ufs: introduce a new ufshcd_statea UFSHCD_STATE_EH_SCHEDULED

Add a new ufshcd_state, indicats that an err handler may get to run
immediately. Use UFSHCD_STATE_ERROR here looks not literaly correct.

Signed-off-by: Zang Leigang <zangleigang@hisilicon.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 576b29c11d7ae1b452b4296223d98648e895ab58..421488161cf3317f95fd1de7e40cb08adddb6772 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -125,6 +125,7 @@ enum {
        UFSHCD_STATE_RESET,
        UFSHCD_STATE_ERROR,
        UFSHCD_STATE_OPERATIONAL,
+       UFSHCD_STATE_EH_SCHEDULED,
 };
 
 /* UFSHCD error handling flags */
@@ -1450,6 +1451,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
        switch (hba->ufshcd_state) {
        case UFSHCD_STATE_OPERATIONAL:
                break;
+       case UFSHCD_STATE_EH_SCHEDULED:
        case UFSHCD_STATE_RESET:
                err = SCSI_MLQUEUE_HOST_BUSY;
                goto out_unlock;
@@ -4212,7 +4214,7 @@ static void ufshcd_check_errors(struct ufs_hba *hba)
                        /* block commands from scsi mid-layer */
                        scsi_block_requests(hba->host);
 
-                       hba->ufshcd_state = UFSHCD_STATE_ERROR;
+                       hba->ufshcd_state = UFSHCD_STATE_EH_SCHEDULED;
                        schedule_work(&hba->eh_work);
                }
        }