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authorJohannes Thumshirn <jthumshirn@suse.de>2016-11-17 10:31:18 +0100
committerMartin K. Petersen <martin.petersen@oracle.com>2016-11-17 20:15:25 -0500
commitbf0f2d380f15f1fa05254b000ddeeb560dfb8638 (patch)
treeea8d464ada113c1f598589b4c724946f45410716 /block/bsg-lib.c
parentad7660cc1ef13551e3d0a649aaba7c728b8c0ac0 (diff)
downloadlinux-0-day-bf0f2d380f15f1fa05254b000ddeeb560dfb8638.tar.gz
block: add reference counting for struct bsg_job
Add reference counting to 'struct bsg_job' so we can implement a reuqest timeout handler for bsg_jobs, which is needed for Fibre Channel. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'block/bsg-lib.c')
-rw-r--r--block/bsg-lib.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index 650f427..632fb40 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -32,8 +32,10 @@
* 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);
+
put_device(job->dev); /* release reference for the request */
kfree(job->request_payload.sg_list);
@@ -84,7 +86,7 @@ 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);
+ kref_put(&job->kref, bsg_destroy_job);
}
static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req)
@@ -142,6 +144,7 @@ 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: