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authorChristoph Hellwig <hch@lst.de>2017-01-03 15:25:02 +0300
committerJens Axboe <axboe@fb.com>2017-01-27 15:08:35 -0700
commit8ae94eb65be9425af4d57a4f4cfebfdf03081e93 (patch)
tree79ae2a0249299fc20b42dd877bf01390f50a8547
parente9c787e65c0c36529745be47d490d998b4b6e589 (diff)
block/bsg: move queue creation into bsg_setup_queue
Simply the boilerplate code needed for bsg nodes a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--block/bsg-lib.c21
-rw-r--r--drivers/scsi/scsi_transport_fc.c36
-rw-r--r--drivers/scsi/scsi_transport_iscsi.c15
-rw-r--r--include/linux/bsg-lib.h5
4 files changed, 25 insertions, 52 deletions
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index 9d652a992316..c74acf426840 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -177,7 +177,7 @@ failjob_rls_job:
*
* Drivers/subsys should pass this to the queue init function.
*/
-void bsg_request_fn(struct request_queue *q)
+static void bsg_request_fn(struct request_queue *q)
__releases(q->queue_lock)
__acquires(q->queue_lock)
{
@@ -214,24 +214,24 @@ void bsg_request_fn(struct request_queue *q)
put_device(dev);
spin_lock_irq(q->queue_lock);
}
-EXPORT_SYMBOL_GPL(bsg_request_fn);
/**
* bsg_setup_queue - Create and add the bsg hooks so we can receive requests
* @dev: device to attach bsg device to
- * @q: request queue setup by caller
* @name: device to give bsg device
* @job_fn: bsg job handler
* @dd_job_size: size of LLD data needed for each job
- *
- * The caller should have setup the reuqest queue with bsg_request_fn
- * as the request_fn.
*/
-int bsg_setup_queue(struct device *dev, struct request_queue *q,
- char *name, bsg_job_fn *job_fn, int dd_job_size)
+struct request_queue *bsg_setup_queue(struct device *dev, char *name,
+ bsg_job_fn *job_fn, int dd_job_size)
{
+ struct request_queue *q;
int ret;
+ q = blk_init_queue(bsg_request_fn, NULL);
+ if (!q)
+ return ERR_PTR(-ENOMEM);
+
q->queuedata = dev;
q->bsg_job_size = dd_job_size;
q->bsg_job_fn = job_fn;
@@ -243,9 +243,10 @@ int bsg_setup_queue(struct device *dev, struct request_queue *q,
if (ret) {
printk(KERN_ERR "%s: bsg interface failed to "
"initialize - register queue\n", dev->kobj.name);
- return ret;
+ blk_cleanup_queue(q);
+ return ERR_PTR(ret);
}
- return 0;
+ return q;
}
EXPORT_SYMBOL_GPL(bsg_setup_queue);
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index afcedec58d17..13dcb9ba823c 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -3765,7 +3765,6 @@ fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
struct device *dev = &shost->shost_gendev;
struct fc_internal *i = to_fc_internal(shost->transportt);
struct request_queue *q;
- int err;
char bsg_name[20];
fc_host->rqst_q = NULL;
@@ -3776,24 +3775,14 @@ fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
snprintf(bsg_name, sizeof(bsg_name),
"fc_host%d", shost->host_no);
- q = blk_init_queue(bsg_request_fn, NULL);
- if (!q) {
- dev_err(dev,
- "fc_host%d: bsg interface failed to initialize - no request queue\n",
- shost->host_no);
- return -ENOMEM;
- }
-
- __scsi_init_queue(shost, q);
- err = bsg_setup_queue(dev, q, bsg_name, fc_bsg_dispatch,
- i->f->dd_bsg_size);
- if (err) {
+ q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size);
+ if (IS_ERR(q)) {
dev_err(dev,
"fc_host%d: bsg interface failed to initialize - setup queue\n",
shost->host_no);
- blk_cleanup_queue(q);
- return err;
+ return PTR_ERR(q);
}
+ __scsi_init_queue(shost, q);
blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
fc_host->rqst_q = q;
@@ -3825,27 +3814,18 @@ fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
struct device *dev = &rport->dev;
struct fc_internal *i = to_fc_internal(shost->transportt);
struct request_queue *q;
- int err;
rport->rqst_q = NULL;
if (!i->f->bsg_request)
return -ENOTSUPP;
- q = blk_init_queue(bsg_request_fn, NULL);
- if (!q) {
- dev_err(dev, "bsg interface failed to initialize - no request queue\n");
- return -ENOMEM;
- }
-
- __scsi_init_queue(shost, q);
- err = bsg_setup_queue(dev, q, NULL, fc_bsg_dispatch, i->f->dd_bsg_size);
- if (err) {
+ q = bsg_setup_queue(dev, NULL, fc_bsg_dispatch, i->f->dd_bsg_size);
+ if (IS_ERR(q)) {
dev_err(dev, "failed to setup bsg queue\n");
- blk_cleanup_queue(q);
- return err;
+ return PTR_ERR(q);
}
-
+ __scsi_init_queue(shost, q);
blk_queue_prep_rq(q, fc_bsg_rport_prep);
blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 04ebe6e65b83..568c9f26a561 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1537,25 +1537,18 @@ iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
struct request_queue *q;
char bsg_name[20];
- int ret;
if (!i->iscsi_transport->bsg_request)
return -ENOTSUPP;
snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
-
- q = blk_init_queue(bsg_request_fn, NULL);
- if (!q)
- return -ENOMEM;
-
- __scsi_init_queue(shost, q);
- ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0);
- if (ret) {
+ q = bsg_setup_queue(dev, bsg_name, iscsi_bsg_host_dispatch, 0);
+ if (IS_ERR(q)) {
shost_printk(KERN_ERR, shost, "bsg interface failed to "
"initialize - no request queue\n");
- blk_cleanup_queue(q);
- return ret;
+ return PTR_ERR(q);
}
+ __scsi_init_queue(shost, q);
ihost->bsg_q = q;
return 0;
diff --git a/include/linux/bsg-lib.h b/include/linux/bsg-lib.h
index 657a718c27d2..e34dde2da0ef 100644
--- a/include/linux/bsg-lib.h
+++ b/include/linux/bsg-lib.h
@@ -66,9 +66,8 @@ struct bsg_job {
void bsg_job_done(struct bsg_job *job, int result,
unsigned int reply_payload_rcv_len);
-int bsg_setup_queue(struct device *dev, struct request_queue *q, char *name,
- bsg_job_fn *job_fn, int dd_job_size);
-void bsg_request_fn(struct request_queue *q);
+struct request_queue *bsg_setup_queue(struct device *dev, char *name,
+ bsg_job_fn *job_fn, int dd_job_size);
void bsg_job_put(struct bsg_job *job);
int __must_check bsg_job_get(struct bsg_job *job);