[PATCH 18/31] block: Make scsi_req_init() calls implicit

Bart Van Assche
2017-05-24T00:34:07Z

Instead of explicitly calling scsi_req_init(), let
blk_get_request() call that function from inside blk_rq_init().
Add an .initialize_rq_fn() callback function to the block drivers
that need it. Merge the IDE .init_rq_fn() function into
.initialize_rq_fn() because it is too small to keep it as a
separate function.

References: commit 82ed4db499b8 ("block: split scsi_request out of struct request")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: linux-block@vger.kernel.org
---
block/bsg.c | 1 -
block/scsi_ioctl.c | 3 ---
drivers/block/pktcdvd.c | 1 -
drivers/cdrom/cdrom.c | 1 -
drivers/ide/ide-atapi.c | 2 --
drivers/ide/ide-cd.c | 1 -
drivers/ide/ide-cd_ioctl.c | 1 -
drivers/ide/ide-devsets.c | 1 -
drivers/ide/ide-disk.c | 1 -
drivers/ide/ide-ioctls.c | 2 --
drivers/ide/ide-park.c | 2 --
drivers/ide/ide-pm.c | 2 --
drivers/ide/ide-probe.c | 6 +++---
drivers/ide/ide-tape.c | 1 -
drivers/ide/ide-taskfile.c | 1 -
drivers/scsi/osd/osd_initiator.c | 2 --
drivers/scsi/osst.c | 1 -
drivers/scsi/scsi_error.c | 1 -
drivers/scsi/scsi_lib.c | 10 +++++++++-
drivers/scsi/scsi_transport_sas.c | 6 ++++++
drivers/scsi/sg.c | 2 --
drivers/scsi/st.c | 1 -
drivers/target/target_core_pscsi.c | 2 --
fs/nfsd/blocklayout.c | 1 -
24 files changed, 18 insertions(+), 34 deletions(-)

diff --git a/block/bsg.c b/block/bsg.c
index f7695bb141d9..3ca080be4c70 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -236,7 +236,6 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm)
rq = blk_get_request(q, op, GFP_KERNEL);
if (IS_ERR(rq))
return rq;
- scsi_req_init(rq);

ret = blk_fill_sgv4_hdr_rq(q, rq, hdr, bd, has_write_perm);
if (ret)
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 4a294a5f7fab..f96c51f5df40 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -326,7 +326,6 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
if (IS_ERR(rq))
return PTR_ERR(rq);
req = scsi_req(rq);
- scsi_req_init(rq);

if (hdr->cmd_len > BLK_MAX_CDB) {
req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
@@ -456,7 +455,6 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
goto error_free_buffer;
}
req = scsi_req(rq);
- scsi_req_init(rq);

cmdlen = COMMAND_SIZE(opcode);

@@ -542,7 +540,6 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
rq = blk_get_request(q, REQ_OP_SCSI_OUT, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
- scsi_req_init(rq);
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
scsi_req(rq)->cmd[0] = cmd;
scsi_req(rq)->cmd[4] = data;
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index b8ce55d7911d..08e3e2fb649b 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -707,7 +707,6 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, __GFP_RECLAIM);
if (IS_ERR(rq))
return PTR_ERR(rq);
- scsi_req_init(rq);

if (cgc->buflen) {
ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen,
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 070568d496dc..e643c9d7beec 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2199,7 +2199,6 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
break;
}
req = scsi_req(rq);
- scsi_req_init(rq);

ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
if (ret) {
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 5901937284e7..7edebe0fb1eb 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -93,7 +93,6 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
int error;

rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = (char *)pc;

@@ -200,7 +199,6 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
memset(sense, 0, sizeof(*sense));

blk_rq_init(rq->q, sense_rq);
- scsi_req_init(sense_rq);

err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len,
GFP_NOIO);
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 07e5ff3a64c3..a14ccb34c923 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -438,7 +438,6 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,

rq = blk_get_request(drive->queue,
write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
ide_req(rq)->type = ATA_PRIV_PC;
rq->rq_flags |= rq_flags;
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 55cd736c39c6..9d26c9737e21 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -304,7 +304,6 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
int ret;

rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
blk_execute_rq(drive->queue, cd->disk, rq, 0);
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index 9b69c32ee560..ef7c8c43a380 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -166,7 +166,6 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
return setting->set(drive, arg);

rq = blk_get_request(q, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 5;
scsi_req(rq)->cmd[0] = REQ_DEVSET_EXEC;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 7c06237f3479..241983da5fc4 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -478,7 +478,6 @@ static int set_multcount(ide_drive_t *drive, int arg)
return -EBUSY;

rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;

drive->mult_req = arg;
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
index 8c0d17297a7a..3661abb16a5f 100644
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -126,7 +126,6 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
struct request *rq;

rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
blk_execute_rq(drive->queue, NULL, rq, 0);
err = scsi_req(rq)->result ? -EIO : 0;
@@ -224,7 +223,6 @@ static int generic_drive_reset(ide_drive_t *drive)
int ret = 0;

rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index 94e3107f59b9..1f264d5d3f3f 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -32,7 +32,6 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
spin_unlock_irq(&hwif->lock);

rq = blk_get_request(q, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
scsi_req(rq)->cmd[0] = REQ_PARK_HEADS;
scsi_req(rq)->cmd_len = 1;
ide_req(rq)->type = ATA_PRIV_MISC;
@@ -48,7 +47,6 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
* timeout has expired, so power management will be reenabled.
*/
rq = blk_get_request(q, REQ_OP_DRV_IN, GFP_NOWAIT);
- scsi_req_init(rq);
if (IS_ERR(rq))
goto out;

diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index 0977fc1f40ce..cfe3c2d7db7f 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -19,7 +19,6 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)

memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_PM_SUSPEND;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
@@ -91,7 +90,6 @@ int generic_ide_resume(struct device *dev)

memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_PM_RESUME;
rq->rq_flags |= RQF_PREEMPT;
rq->special = &rqpm;
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index fdfa11f80dda..6b979f27584c 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -741,12 +741,12 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
}
}

-static int ide_init_rq(struct request_queue *q, struct request *rq, gfp_t gfp)
+static void ide_initialize_rq(struct request *rq)
{
struct ide_request *req = blk_mq_rq_to_pdu(rq);

+ scsi_req_init(rq);
req->sreq.sense = req->sense;
- return 0;
}

/*
@@ -771,7 +771,7 @@ static int ide_init_queue(ide_drive_t *drive)
return 1;

q->request_fn = do_ide_request;
- q->init_rq_fn = ide_init_rq;
+ q->initialize_rq_fn = ide_initialize_rq;
q->cmd_size = sizeof(struct ide_request);
queue_flag_set_unlocked(QUEUE_FLAG_SCSI_SUP, q);
if (blk_init_allocated_queue(q) < 0) {
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index a0651f948b76..370fd39dce94 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -855,7 +855,6 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
BUG_ON(size < 0 || size % tape->blk_size);

rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd[13] = cmd;
rq->rq_disk = tape->disk;
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index d71199d23c9e..d915a8eba557 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -433,7 +433,6 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
rq = blk_get_request(drive->queue,
(cmd->tf_flags & IDE_TFLAG_WRITE) ?
REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
- scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;

/*
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 8a1b94816419..d974e7f1d2f1 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -1572,7 +1572,6 @@ static struct request *_make_request(struct request_queue *q, bool has_write,
flags);
if (IS_ERR(req))
return req;
- scsi_req_init(req);

for_each_bio(bio) {
struct bio *bounce_bio = bio;
@@ -1617,7 +1616,6 @@ static int _init_blk_request(struct osd_request *or,
ret = PTR_ERR(req);
goto out;
}
- scsi_req_init(req);
or->in.req = or->request->next_rq = req;
}
} else if (has_in)
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 67cbed92f07d..22080148c6a8 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -373,7 +373,6 @@ static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd,
return DRIVER_ERROR << 24;

rq = scsi_req(req);
- scsi_req_init(req);
req->rq_flags |= RQF_QUIET;

SRpnt->bio = NULL;
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index bbcc269f0ec1..e2e614e990a8 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1915,7 +1915,6 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
if (IS_ERR(req))
return;
rq = scsi_req(req);
- scsi_req_init(req);

rq->cmd[0] = ALLOW_MEDIUM_REMOVAL;
rq->cmd[1] = 0;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 4cecf82960b7..01ddf05e741e 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -249,7 +249,6 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
if (IS_ERR(req))
return ret;
rq = scsi_req(req);
- scsi_req_init(req);

if (bufflen && blk_rq_map_kern(sdev->request_queue, req,
buffer, bufflen, __GFP_RECLAIM))
@@ -1133,6 +1132,13 @@ int scsi_init_io(struct scsi_cmnd *cmd)
}
EXPORT_SYMBOL(scsi_init_io);

+/* Called from inside blk_get_request() */
+static void scsi_initialize_rq(struct request *rq)
+{
+ scsi_req_init(rq);
+}
+
+/* Called after a request has been started. */
void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd)
{
void *buf = cmd->sense_buffer;
@@ -2091,6 +2097,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
* blk_queue_update_dma_alignment() later.
*/
blk_queue_dma_alignment(q, 0x03);
+
+ q->initialize_rq_fn = scsi_initialize_rq;
}
EXPORT_SYMBOL_GPL(__scsi_init_queue);

diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index e5eab2685ecf..2512242812d6 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -213,6 +213,11 @@ static void sas_host_release(struct device *dev)
blk_cleanup_queue(q);
}

+static void sas_initialize_rq(struct request *rq)
+{
+ scsi_req_init(rq);
+}
+
static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
{
struct request_queue *q;
@@ -230,6 +235,7 @@ static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
q = blk_alloc_queue(GFP_KERNEL);
if (!q)
return -ENOMEM;
+ q->initialize_rq_fn = sas_initialize_rq;
q->cmd_size = sizeof(struct scsi_request);

if (rphy) {
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 0a38ba01b7b4..071a7fe27c11 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1732,8 +1732,6 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
}
req = scsi_req(rq);

- scsi_req_init(rq);
-
if (hp->cmd_len > BLK_MAX_CDB)
req->cmd = long_cmdp;
memcpy(req->cmd, cmd, hp->cmd_len);
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 1ea34d6f5437..dc4d2b9e15a0 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -549,7 +549,6 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
if (IS_ERR(req))
return DRIVER_ERROR << 24;
rq = scsi_req(req);
- scsi_req_init(req);
req->rq_flags |= RQF_QUIET;

mdata->null_mapped = 1;
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index a93d94e68ab5..4df4fd5783c3 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -992,8 +992,6 @@ pscsi_execute_cmd(struct se_cmd *cmd)
goto fail;
}

- scsi_req_init(req);
-
if (sgl) {
ret = pscsi_map_sg(cmd, sgl, sgl_nents, req);
if (ret)
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 9ca0ca5efbc8..f185fd979448 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -232,7 +232,6 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
goto out_free_buf;
}
req = scsi_req(rq);
- scsi_req_init(rq);

error = blk_rq_map_kern(q, rq, buf, bufflen, GFP_KERNEL);
if (error)
--
2.12.2