block: split scsi_request out of struct request
And require all drivers that want to support BLOCK_PC to allocate it
as the first thing of their private data. To support this the legacy
IDE and BSG code is switched to set cmd_size on their queues to let
the block layer allocate the additional space.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index f079d8d..3bd678ad 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -203,7 +203,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
- memcpy(rq->cmd, pc->c, 12);
+ memcpy(scsi_req(rq)->cmd, pc->c, 12);
pc->rq = rq;
if (cmd == WRITE)
@@ -216,7 +216,7 @@ static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
struct ide_atapi_pc *pc, struct request *rq)
{
ide_init_pc(pc);
- memcpy(pc->c, rq->cmd, sizeof(pc->c));
+ memcpy(pc->c, scsi_req(rq)->cmd, sizeof(pc->c));
pc->rq = rq;
if (blk_rq_bytes(rq)) {
pc->flags |= PC_FLAG_DMA_OK;