[PATCH 7.1 266/438] ata: libata-scsi: schedule deferred atapi command

7.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Damien Le Moal <[email protected]>

commit e7468b3f9b404ac7c1329ef07c146c3356dfbd01 upstream.

Modify atapi_qc_complete() to call ata_scsi_schedule_deferred_qc() to
ensure that any deferred queued command can execute. This is similar to
ata_scsi_qc_complete() function for regular ATA devices.

Fixes: 0ea84089dbf6 ("ata: libata-scsi: avoid Non-NCQ command starvation")
Cc: [email protected]
Signed-off-by: Damien Le Moal <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 drivers/ata/libata-scsi.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2991,6 +2991,7 @@ static void atapi_fixup_inquiry(struct s
 
 static void atapi_qc_complete(struct ata_queued_cmd *qc)
 {
+	struct ata_link *link = qc->dev->link;
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	unsigned int err_mask = qc->err_mask;
 
@@ -3020,12 +3021,12 @@ static void atapi_qc_complete(struct ata
 			ata_scsi_qc_done(qc, false, 0);
 		else
 			ata_scsi_qc_done(qc, true, SAM_STAT_CHECK_CONDITION);
-		return;
+		goto schedule_deferred;
 	}
 
 	if (cmd->result) {
 		ata_scsi_qc_done(qc, false, 0);
-		return;
+		goto schedule_deferred;
 	}
 
 	/* successful completion path */
@@ -3033,6 +3034,9 @@ static void atapi_qc_complete(struct ata
 		atapi_fixup_inquiry(cmd);
 
 	ata_scsi_qc_done(qc, true, SAM_STAT_GOOD);
+
+schedule_deferred:
+	ata_scsi_schedule_deferred_qc(link);
 }
 /**
  *	atapi_xlat - Initialize PACKET taskfile