ide-tape: pass packet command in rq->cmd

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

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index f43ffb8..a6d4e48 100644 (file)
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -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);
 }
 
@@ -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;
@@ -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,
@@ -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) {
@@ -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;