ide: add PC_FLAG_DRQ_INTERRUPT pc flag

Add PC_FLAG_DRQ_INTERRUPT pc flag, set it in ide*_do_request()
and check for it (instead of checking for IDE*_FLAG_DRQ_INTERRUPT)
in ide*_issue_pc().  This is a preparation for adding generic
ide_issue_pc() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-floppy.c

@@ -619,7 +619,7 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 
 	ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma);
 
-	if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
+	if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
 		/* Issue the packet command */
 		ide_execute_command(drive, WIN_PACKETCMD,
 				&idefloppy_transfer_pc1,
@@ -800,6 +800,9 @@ static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 		return ide_stopped;
 	}
 
+	if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT)
+		pc->flags |= PC_FLAG_DRQ_INTERRUPT;
+
 	if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE)
 		pc->flags |= PC_FLAG_ZIP_DRIVE;
 

drivers/ide/ide-tape.c

@@ -1020,7 +1020,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
 
 	ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma_ok);
 
-	if (test_bit(IDETAPE_FLAG_DRQ_INTERRUPT, &tape->flags)) {
+	if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
 		ide_execute_command(drive, WIN_PACKETCMD, &idetape_transfer_pc,
 				    IDETAPE_WAIT_CMD, NULL);
 		return ide_started;
@@ -1143,8 +1143,10 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 	}
 
 	/* Retry a failed packet command */
-	if (tape->failed_pc && tape->pc->c[0] == REQUEST_SENSE)
-		return idetape_issue_pc(drive, tape->failed_pc);
+	if (tape->failed_pc && tape->pc->c[0] == REQUEST_SENSE) {
+		pc = tape->failed_pc;
+		goto out;
+	}
 
 	if (postponed_rq != NULL)
 		if (rq != postponed_rq) {
@@ -1216,6 +1218,9 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 	}
 	BUG();
 out:
+	if (test_bit(IDETAPE_FLAG_DRQ_INTERRUPT, &tape->flags))
+		pc->flags |= PC_FLAG_DRQ_INTERRUPT;
+
 	return idetape_issue_pc(drive, pc);
 }
 

drivers/scsi/ide-scsi.c

@@ -525,7 +525,7 @@ static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
 
 	ide_pktcmd_tf_load(drive, 0, bcount, dma);
 
-	if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) {
+	if (pc->flags & PC_FLAG_DRQ_INTERRUPT) {
 		ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc,
 				    get_timeout(pc), idescsi_expiry);
 		return ide_started;
@@ -548,6 +548,10 @@ static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *r
 
 	if (blk_sense_request(rq) || blk_special_request(rq)) {
 		struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
+		idescsi_scsi_t *scsi = drive_to_idescsi(drive);
+
+		if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags))
+			pc->flags |= PC_FLAG_DRQ_INTERRUPT;
 
 		if (drive->using_dma && !idescsi_map_sg(drive, pc))
 			pc->flags |= PC_FLAG_DMA_OK;

include/linux/ide.h

@@ -608,6 +608,7 @@ enum {
 	/* command timed out */
 	PC_FLAG_TIMEDOUT		= (1 << 7),
 	PC_FLAG_ZIP_DRIVE		= (1 << 8),
+	PC_FLAG_DRQ_INTERRUPT		= (1 << 9),
 };
 
 struct ide_atapi_pc {