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ide-tape: pass packet command in rq->cmd
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Make a redundant copy of the packet command bits into rq->cmd. Later, after
all drivers have been converted, it'll be switched to use that in the
common code instead of pc->c. While at it, simplify ide_tape_create_rw_cmd.

There should be no functionality change resulting from this patch.

Signed-off-by: Borislav Petkov <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
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Borislav Petkov authored and bzolnier committed Jul 23, 2008
1 parent 83dd573 commit 0014c75
Showing 1 changed file with 11 additions and 8 deletions.
19 changes: 11 additions & 8 deletions drivers/ide/ide-tape.c
Original file line number Diff line number Diff line change
Expand Up @@ -730,6 +730,7 @@ static void idetape_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
rq->cmd_flags |= REQ_PREEMPT;
rq->buffer = (char *) pc;
rq->rq_disk = tape->disk;
memcpy(rq->cmd, pc->c, 12);
ide_do_drive_cmd(drive, rq);
}

Expand Down Expand Up @@ -952,9 +953,12 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
}

static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
struct ide_atapi_pc *pc, unsigned int length,
struct idetape_bh *bh, u8 opcode)
struct ide_atapi_pc *pc, struct request *rq,
u8 opcode)
{
struct idetape_bh *bh = (struct idetape_bh *)rq->special;
unsigned int length = rq->current_nr_sectors;

idetape_init_pc(pc);
put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
pc->c[1] = 1;
Expand All @@ -974,6 +978,8 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
pc->b_data = bh->b_data;
pc->b_count = atomic_read(&bh->b_count);
}

memcpy(rq->cmd, pc->c, 12);
}

static ide_startstop_t idetape_do_request(ide_drive_t *drive,
Expand Down Expand Up @@ -1051,16 +1057,12 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
}
if (rq->cmd[13] & REQ_IDETAPE_READ) {
pc = idetape_next_pc_storage(drive);
ide_tape_create_rw_cmd(tape, pc, rq->current_nr_sectors,
(struct idetape_bh *)rq->special,
READ_6);
ide_tape_create_rw_cmd(tape, pc, rq, READ_6);
goto out;
}
if (rq->cmd[13] & REQ_IDETAPE_WRITE) {
pc = idetape_next_pc_storage(drive);
ide_tape_create_rw_cmd(tape, pc, rq->current_nr_sectors,
(struct idetape_bh *)rq->special,
WRITE_6);
ide_tape_create_rw_cmd(tape, pc, rq, WRITE_6);
goto out;
}
if (rq->cmd[13] & REQ_IDETAPE_PC1) {
Expand Down Expand Up @@ -1283,6 +1285,7 @@ static int idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd[13] = REQ_IDETAPE_PC1;
rq->buffer = (char *)pc;
memcpy(rq->cmd, pc->c, 12);
error = blk_execute_rq(drive->queue, tape->disk, rq, 0);
blk_put_request(rq);
return error;
Expand Down

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