ide-scsi: use pc->callback

* Add ide_scsi_callback() pc->callback implementation, then update
  idescsi_check_condition() and idescsi_queue() to setup ->callback.

* Convert idescsi_pc_intr() to use pc->callback.

This is a preparation for adding generic ide_pc_intr() helper.

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

drivers/scsi/ide-scsi.c

@@ -183,6 +183,24 @@ static void ide_scsi_hex_dump(u8 *data, int len)
 	print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
 }
 
+static int idescsi_end_request(ide_drive_t *, int, int);
+
+static void ide_scsi_callback(ide_drive_t *drive)
+{
+	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
+	struct ide_atapi_pc *pc = scsi->pc;
+
+	if (pc->flags & PC_FLAG_TIMEDOUT)
+		debug_log("%s: got timed out packet %lu at %lu\n", __func__,
+			  pc->scsi_cmd->serial_number, jiffies);
+		/* end this request now - scsi should retry it*/
+	else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
+		printk(KERN_INFO "Packet command completed, %d bytes"
+				 " transferred\n", pc->xferred);
+
+	idescsi_end_request(drive, 1, 0);
+}
+
 static int idescsi_check_condition(ide_drive_t *drive,
 		struct request *failed_cmd)
 {
@@ -210,6 +228,7 @@ static int idescsi_check_condition(ide_drive_t *drive,
 	rq->cmd_type = REQ_TYPE_SENSE;
 	rq->cmd_flags |= REQ_PREEMPT;
 	pc->timeout = jiffies + WAIT_READY;
+	pc->callback = ide_scsi_callback;
 	/* NOTE! Save the failed packet command in "rq->buffer" */
 	rq->buffer = (void *) failed_cmd->special;
 	pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
@@ -222,8 +241,6 @@ static int idescsi_check_condition(ide_drive_t *drive,
 	return 0;
 }
 
-static int idescsi_end_request(ide_drive_t *, int, int);
-
 static ide_startstop_t
 idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
 {
@@ -350,10 +367,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 	debug_log("Reached %s interrupt handler\n", __func__);
 
 	if (pc->flags & PC_FLAG_TIMEDOUT) {
-		debug_log("%s: got timed out packet %lu at %lu\n", __func__,
-			  pc->scsi_cmd->serial_number, jiffies);
-		/* end this request now - scsi should retry it*/
-		idescsi_end_request (drive, 1, 0);
+		pc->callback(drive);
 		return ide_stopped;
 	}
 	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
@@ -369,14 +383,11 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 
 	if ((stat & DRQ_STAT) == 0) {
 		/* No more interrupts */
-		if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
-			printk(KERN_INFO "Packet command completed, %d bytes"
-					" transferred\n", pc->xferred);
 		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 		local_irq_enable_in_hardirq();
 		if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR))
 			rq->errors++;
-		idescsi_end_request (drive, 1, 0);
+		pc->callback(drive);
 		return ide_stopped;
 	}
 	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
@@ -718,6 +729,7 @@ static int idescsi_queue (struct scsi_cmnd *cmd,
 	pc->scsi_cmd = cmd;
 	pc->done = done;
 	pc->timeout = jiffies + cmd->timeout_per_command;
+	pc->callback = ide_scsi_callback;
 
 	if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
 		printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);