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block: split scsi_request out of struct request

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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>
This commit is contained in:
Christoph Hellwig
2017-01-27 09:46:29 +01:00
committed by Jens Axboe
parent 8ae94eb65b
commit 82ed4db499
49 changed files with 457 additions and 409 deletions
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6
drivers/ide/ide-ioctls.c
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@@ -126,6 +126,7 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
struct request *rq;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
err = blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
@@ -222,9 +223,10 @@ static int generic_drive_reset(ide_drive_t *drive)
int ret = 0;
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
rq->cmd_len = 1;
rq->cmd[0] = REQ_DRIVE_RESET;
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
if (blk_execute_rq(drive->queue, NULL, rq, 1))
ret = rq->errors;
blk_put_request(rq);