Add scsi_unprep_fn and set this function as the unprep_rq_fn for the scsi
queue. This will allow SCSI resources to be released if the block layer
unpreps a request.
Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Cc: James Bottomley <James.Bottomley@suse.de>
---
drivers/scsi/scsi_lib.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 1646fe7..1685d35 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -91,6 +91,17 @@ static void scsi_unprep_request(struct request *req)
scsi_put_command(cmd);
}
+static void scsi_unprep_fn(struct request_queue *q, struct request *req)
+{
+ struct scsi_cmnd *cmd = req->special;
+
+ if (cmd) {
+ scsi_release_buffers(cmd);
+ scsi_unprep_request(req);
+ }
+}
+
+
/**
* __scsi_queue_insert - private queue insertion
* @cmd: The SCSI command being requeued
@@ -1664,6 +1675,7 @@ struct request_queue *scsi_alloc_queue(struct scsi_device *sdev)
return NULL;
blk_queue_prep_rq(q, scsi_prep_fn);
+ blk_queue_unprep_rq(q, scsi_unprep_fn);
blk_queue_softirq_done(q, scsi_softirq_done);
blk_queue_rq_timed_out(q, scsi_times_out);
blk_queue_lld_busy(q, scsi_lld_busy);
--
1.6.6.1
--
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scsi: Add a scsi_unprep_fn
