X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fide%2Fide-tape.c;h=72caca3cb7aab2328323020a4ec34f4bb8324e82;hb=6b0da28b2d0f4f4e2c55689fc062db569075ff60;hp=f8c84df4a0bcf5e743cc2b341973488786602f29;hpb=4c7145a1ec1bb789d5f07e47510e8bda546a7c4a;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index f8c84df4a0b..72caca3cb7a 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -172,23 +172,16 @@ typedef struct ide_tape_obj {
 	struct kref	kref;
 
 	/*
-	 *	pc points to the current processed packet command.
-	 *
 	 *	failed_pc points to the last failed packet command, or contains
 	 *	NULL if we do not need to retry any packet command. This is
 	 *	required since an additional packet command is needed before the
 	 *	retry, to get detailed information on what went wrong.
 	 */
-	/* Current packet command */
-	struct ide_atapi_pc *pc;
 	/* Last failed packet command */
 	struct ide_atapi_pc *failed_pc;
 	/* used by REQ_IDETAPE_{READ,WRITE} requests */
 	struct ide_atapi_pc queued_pc;
 
-	struct ide_atapi_pc request_sense_pc;
-	struct request request_sense_rq;
-
 	/*
 	 * DSC polling variables.
 	 *
@@ -522,14 +515,19 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
 	return 0;
 }
 
-static void ide_tape_callback(ide_drive_t *drive)
+static void ide_tape_handle_dsc(ide_drive_t *);
+
+static void ide_tape_callback(ide_drive_t *drive, int dsc)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	struct ide_atapi_pc *pc = tape->pc;
+	struct ide_atapi_pc *pc = drive->pc;
 	int uptodate = pc->error ? 0 : 1;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
+	if (dsc)
+		ide_tape_handle_dsc(drive);
+
 	if (tape->failed_pc == pc)
 		tape->failed_pc = NULL;
 
@@ -558,7 +556,7 @@ static void ide_tape_callback(ide_drive_t *drive)
 		if (pc->error)
 			uptodate = pc->error;
 	} else if (pc->c[0] == READ_POSITION && uptodate) {
-		u8 *readpos = tape->pc->buf;
+		u8 *readpos = pc->buf;
 
 		debug_log(DBG_SENSE, "BOP - %s\n",
 				(readpos[0] & 0x80) ? "Yes" : "No");
@@ -583,31 +581,6 @@ static void ide_tape_callback(ide_drive_t *drive)
 	idetape_end_request(drive, uptodate, 0);
 }
 
-static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
-{
-	ide_init_pc(pc);
-	pc->c[0] = REQUEST_SENSE;
-	pc->c[4] = 20;
-	pc->req_xfer = 20;
-}
-
-/*
- *	idetape_retry_pc is called when an error was detected during the
- *	last packet command. We queue a request sense packet command in
- *	the head of the request list.
- */
-static void idetape_retry_pc(ide_drive_t *drive)
-{
-	struct ide_tape_obj *tape = drive->driver_data;
-	struct request *rq = &tape->request_sense_rq;
-	struct ide_atapi_pc *pc = &tape->request_sense_pc;
-
-	(void)ide_read_error(drive);
-	idetape_create_request_sense_cmd(pc);
-	set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
-	ide_queue_pc_head(drive, tape->disk, pc, rq);
-}
-
 /*
  * Postpone the current request so that ide.c will be able to service requests
  * from another device on the same hwgroup while we are polling for DSC.
@@ -654,17 +627,14 @@ static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
  */
 static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 {
-	idetape_tape_t *tape = drive->driver_data;
-
-	return ide_pc_intr(drive, tape->pc, idetape_pc_intr, WAIT_TAPE_CMD,
-			   NULL, idetape_update_buffers, idetape_retry_pc,
-			   ide_tape_handle_dsc, ide_tape_io_buffers);
+	return ide_pc_intr(drive, idetape_pc_intr, idetape_update_buffers,
+			   ide_tape_io_buffers);
 }
 
 /*
  * Packet Command Interface
  *
- * The current Packet Command is available in tape->pc, and will not change
+ * The current Packet Command is available in drive->pc, and will not change
  * until we finish handling it. Each packet command is associated with a
  * callback function that will be called when the command is finished.
  *
@@ -699,10 +669,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
  */
 static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
 {
-	idetape_tape_t *tape = drive->driver_data;
-
-	return ide_transfer_pc(drive, tape->pc, idetape_pc_intr,
-			       WAIT_TAPE_CMD, NULL);
+	return ide_transfer_pc(drive, idetape_pc_intr, WAIT_TAPE_CMD, NULL);
 }
 
 static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
@@ -710,7 +677,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
 {
 	idetape_tape_t *tape = drive->driver_data;
 
-	if (tape->pc->c[0] == REQUEST_SENSE &&
+	if (drive->pc->c[0] == REQUEST_SENSE &&
 	    pc->c[0] == REQUEST_SENSE) {
 		printk(KERN_ERR "ide-tape: possible ide-tape.c bug - "
 			"Two request sense in serial were issued\n");
@@ -718,8 +685,9 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
 
 	if (tape->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
 		tape->failed_pc = pc;
+
 	/* Set the current packet command */
-	tape->pc = pc;
+	drive->pc = pc;
 
 	if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
 		(pc->flags & PC_FLAG_ABORT)) {
@@ -743,15 +711,14 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
 			pc->error = IDETAPE_ERROR_GENERAL;
 		}
 		tape->failed_pc = NULL;
-		drive->pc_callback(drive);
+		drive->pc_callback(drive, 0);
 		return ide_stopped;
 	}
 	debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);
 
 	pc->retries++;
 
-	return ide_issue_pc(drive, pc, idetape_transfer_pc,
-			    WAIT_TAPE_CMD, NULL);
+	return ide_issue_pc(drive, idetape_transfer_pc, WAIT_TAPE_CMD, NULL);
 }
 
 /* A mode sense command is used to "sense" tape parameters. */
@@ -785,7 +752,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	idetape_tape_t *tape = drive->driver_data;
-	struct ide_atapi_pc *pc = tape->pc;
+	struct ide_atapi_pc *pc = drive->pc;
 	u8 stat;
 
 	stat = hwif->tp_ops->read_status(hwif);
@@ -797,7 +764,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
 				printk(KERN_ERR "ide-tape: %s: I/O error, ",
 						tape->name);
 			/* Retry operation */
-			idetape_retry_pc(drive);
+			ide_retry_pc(drive, tape->disk);
 			return ide_stopped;
 		}
 		pc->error = 0;
@@ -805,7 +772,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
 		pc->error = IDETAPE_ERROR_GENERAL;
 		tape->failed_pc = NULL;
 	}
-	drive->pc_callback(drive);
+	drive->pc_callback(drive, 0);
 	return ide_stopped;
 }
 
@@ -862,7 +829,7 @@ 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) {
+	if (tape->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
 		pc = tape->failed_pc;
 		goto out;
 	}