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-rw-r--r--block/bsg-lib.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index b2a61e3ecb14..9d652a992316 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -32,8 +32,13 @@
* bsg_destroy_job - routine to teardown/delete a bsg job
* @job: bsg_job that is to be torn down
*/
-static void bsg_destroy_job(struct bsg_job *job)
+static void bsg_destroy_job(struct kref *kref)
{
+ struct bsg_job *job = container_of(kref, struct bsg_job, kref);
+ struct request *rq = job->req;
+
+ blk_end_request_all(rq, rq->errors);
+
put_device(job->dev); /* release reference for the request */
kfree(job->request_payload.sg_list);
@@ -41,6 +46,18 @@ static void bsg_destroy_job(struct bsg_job *job)
kfree(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
* @job: bsg_job that is complete
@@ -83,8 +100,7 @@ static void bsg_softirq_done(struct request *rq)
{
struct bsg_job *job = rq->special;
- blk_end_request_all(rq, rq->errors);
- bsg_destroy_job(job);
+ bsg_job_put(job);
}
static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
@@ -142,6 +158,7 @@ static int bsg_create_job(struct device *dev, struct request *req)
job->dev = dev;
/* take a reference for the request */
get_device(job->dev);
+ kref_init(&job->kref);
return 0;
failjob_rls_rqst_payload: