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scsi: return blk_status_t from device handler ->prep_fn 

Remove the last use of the old BLKPREP_* values, which get converted
to BLK_STS_* later anyway.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2018-11-09 14:42:40 +01:00 committed by Jens Axboe
parent 159b2cbf59
commit 4c1cb67c03
6 changed files with 26 additions and 39 deletions
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23
drivers/scsi/device_handler/scsi_dh_alua.c
View File

@ -1071,28 +1071,29 @@ static void alua_check(struct scsi_device *sdev, bool force)
* Fail I/O to all paths not in state
* active/optimized or active/non-optimized.
*/
static int alua_prep_fn(struct scsi_device *sdev, struct request *req)
static blk_status_t alua_prep_fn(struct scsi_device *sdev, struct request *req)
{
struct alua_dh_data *h = sdev->handler_data;
struct alua_port_group *pg;
unsigned char state = SCSI_ACCESS_STATE_OPTIMAL;
int ret = BLKPREP_OK;
rcu_read_lock();
pg = rcu_dereference(h->pg);
if (pg)
state = pg->state;
rcu_read_unlock();
if (state == SCSI_ACCESS_STATE_TRANSITIONING)
ret = BLKPREP_DEFER;
else if (state != SCSI_ACCESS_STATE_OPTIMAL &&
state != SCSI_ACCESS_STATE_ACTIVE &&
state != SCSI_ACCESS_STATE_LBA) {
ret = BLKPREP_KILL;
req->rq_flags |= RQF_QUIET;
}
return ret;
switch (state) {
case SCSI_ACCESS_STATE_OPTIMAL:
case SCSI_ACCESS_STATE_ACTIVE:
case SCSI_ACCESS_STATE_LBA:
return BLK_STS_OK;
case SCSI_ACCESS_STATE_TRANSITIONING:
return BLK_STS_RESOURCE;
default:
req->rq_flags |= RQF_QUIET;
return BLK_STS_IOERR;
}
}
static void alua_rescan(struct scsi_device *sdev)

8
drivers/scsi/device_handler/scsi_dh_emc.c
View File

@ -341,17 +341,17 @@ static int clariion_check_sense(struct scsi_device *sdev,
return SCSI_RETURN_NOT_HANDLED;
}
static int clariion_prep_fn(struct scsi_device *sdev, struct request *req)
static blk_status_t clariion_prep_fn(struct scsi_device *sdev,
struct request *req)
{
struct clariion_dh_data *h = sdev->handler_data;
int ret = BLKPREP_OK;
if (h->lun_state != CLARIION_LUN_OWNED) {
ret = BLKPREP_KILL;
req->rq_flags |= RQF_QUIET;
return BLK_STS_IOERR;
}
return ret;
return BLK_STS_OK;
}
static int clariion_std_inquiry(struct scsi_device *sdev,

7
drivers/scsi/device_handler/scsi_dh_hp_sw.c
View File

@ -172,17 +172,16 @@ retry:
return rc;
}
static int hp_sw_prep_fn(struct scsi_device *sdev, struct request *req)
static blk_status_t hp_sw_prep_fn(struct scsi_device *sdev, struct request *req)
{
struct hp_sw_dh_data *h = sdev->handler_data;
int ret = BLKPREP_OK;
if (h->path_state != HP_SW_PATH_ACTIVE) {
ret = BLKPREP_KILL;
req->rq_flags |= RQF_QUIET;
return BLK_STS_IOERR;
}
return ret;
return BLK_STS_OK;
}
/*

7
drivers/scsi/device_handler/scsi_dh_rdac.c
View File

@ -642,17 +642,16 @@ done:
return 0;
}
static int rdac_prep_fn(struct scsi_device *sdev, struct request *req)
static blk_status_t rdac_prep_fn(struct scsi_device *sdev, struct request *req)
{
struct rdac_dh_data *h = sdev->handler_data;
int ret = BLKPREP_OK;
if (h->state != RDAC_STATE_ACTIVE) {
ret = BLKPREP_KILL;
req->rq_flags |= RQF_QUIET;
return BLK_STS_IOERR;
}
return ret;
return BLK_STS_OK;
}
static int rdac_check_sense(struct scsi_device *sdev,

18
drivers/scsi/scsi_lib.c
View File

@ -1177,18 +1177,6 @@ void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd)
scsi_add_cmd_to_list(cmd);
}
static inline blk_status_t prep_to_mq(int ret)
{
switch (ret) {
case BLKPREP_OK:
return BLK_STS_OK;
case BLKPREP_DEFER:
return BLK_STS_RESOURCE;
default:
return BLK_STS_IOERR;
}
}
static blk_status_t scsi_setup_scsi_cmnd(struct scsi_device *sdev,
struct request *req)
{
@ -1227,9 +1215,9 @@ static blk_status_t scsi_setup_fs_cmnd(struct scsi_device *sdev,
struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req);
if (unlikely(sdev->handler && sdev->handler->prep_fn)) {
int ret = sdev->handler->prep_fn(sdev, req);
if (ret != BLKPREP_OK)
return prep_to_mq(ret);
blk_status_t ret = sdev->handler->prep_fn(sdev, req);
if (ret != BLK_STS_OK)
return ret;
}
cmd->cmnd = scsi_req(req)->cmd = scsi_req(req)->__cmd;

2
include/scsi/scsi_dh.h
View File

@ -69,7 +69,7 @@ struct scsi_device_handler {
int (*attach)(struct scsi_device *);
void (*detach)(struct scsi_device *);
int (*activate)(struct scsi_device *, activate_complete, void *);
int (*prep_fn)(struct scsi_device *, struct request *);
blk_status_t (*prep_fn)(struct scsi_device *, struct request *);
int (*set_params)(struct scsi_device *, const char *);
void (*rescan)(struct scsi_device *);
};