[PATCH v4 13/15] block: add bsg_job_put() and bsg_job_get()

[Johannes Thumshirn]

Add bsg_job_put() and bsg_job_get() so don't need to export
bsg_destroy_job() any more.

Signed-off-by: Johannes Thumshirn <jthumsh...@suse.de>
Reviewed-by: Hannes Reinecke <h...@suse.com>
---
 block/bsg-lib.c                  | 17 ++++++++++++++---
 drivers/scsi/scsi_transport_fc.c |  4 ++--
 include/linux/bsg-lib.h          |  3 ++-
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index 6661f82..803ec40 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -32,7 +32,7 @@
  * bsg_destroy_job - routine to teardown/delete a bsg job
  * @job: bsg_job that is to be torn down
  */
-void bsg_destroy_job(struct kref *kref)
+static void bsg_destroy_job(struct kref *kref)
 {
        struct bsg_job *job = container_of(kref, struct bsg_job, kref);
        struct request *rq = job->req;
@@ -45,7 +45,18 @@ void bsg_destroy_job(struct kref *kref)
        kfree(job->reply_payload.sg_list);
        kfree(job);
 }
-EXPORT_SYMBOL_GPL(bsg_destroy_job);
+
+void bsg_job_put(struct bsg_job *job)
+{
+       kref_put(&job->kref, bsg_destroy_job);
+}
+EXPORT_SYMBOL_GPL(bsg_job_put);
+
+int bsg_job_get(struct bsg_job *job)
+{
+       return kref_get_unless_zero(&job->kref);
+}
+EXPORT_SYMBOL_GPL(bsg_job_get);
 
 /**
  * bsg_job_done - completion routine for bsg requests
@@ -89,7 +100,7 @@ void bsg_softirq_done(struct request *rq)
 {
        struct bsg_job *job = rq->special;
 
-       kref_put(&job->kref, bsg_destroy_job);
+       bsg_job_put(job);
 }
 EXPORT_SYMBOL_GPL(bsg_softirq_done);
 
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 4cf82c0..fb45d3a 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -3571,13 +3571,13 @@ struct fc_vport *
        if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
                return BLK_EH_RESET_TIMER;
 
-       inflight = kref_get_unless_zero(&job->kref);
+       inflight = bsg_job_get(job);
 
        if (inflight && i->f->bsg_timeout) {
                /* call LLDD to abort the i/o as it has timed out */
                err = i->f->bsg_timeout(job);
                if (err == -EAGAIN) {
-                       kref_put(&job->kref, bsg_destroy_job);
+                       bsg_job_put(job);
                        return BLK_EH_RESET_TIMER;
                } else if (err)
                        printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
diff --git a/include/linux/bsg-lib.h b/include/linux/bsg-lib.h
index 09f3044..b708db9 100644
--- a/include/linux/bsg-lib.h
+++ b/include/linux/bsg-lib.h
@@ -69,7 +69,8 @@ void bsg_job_done(struct bsg_job *job, int result,
 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);
-void bsg_destroy_job(struct kref *kref);
 void bsg_softirq_done(struct request *rq);
+void bsg_job_put(struct bsg_job *job);
+int __must_check bsg_job_get(struct bsg_job *job);
 
 #endif
-- 
1.8.5.6

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