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| author | Tejun Heo <htejun@gmail.com> | 2006-04-11 17:27:53 +0900 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-04-13 13:25:49 -0500 |
| commit | e36e0c80137af8f012528938dab2970c26d5ec4c (patch) | |
| tree | fd48fe9041800b7f995f12e64d08d3857f00af8b | |
| parent | aedf349773e5877d716a89368d512b9baa3e8c7b (diff) | |
| download | kernel_samsung_smdk4412-e36e0c80137af8f012528938dab2970c26d5ec4c.zip kernel_samsung_smdk4412-e36e0c80137af8f012528938dab2970c26d5ec4c.tar.gz kernel_samsung_smdk4412-e36e0c80137af8f012528938dab2970c26d5ec4c.tar.bz2 | |
[SCSI] SCSI: fix scsi_kill_request() busy count handling
scsi_kill_request() completes requests via normal SCSI completion path
which decrements busy counts; however, requests which get passed to
scsi_kill_request() aren't holding busy counts and scsi_kill_request()
don't increment them before invoking completion path resulting in
incorrect busy counts. Bump up busy counts before invoking completion
path.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 8f010a3..7b0f9a3 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1479,6 +1479,8 @@ static inline int scsi_host_queue_ready(struct request_queue *q, static void scsi_kill_request(struct request *req, request_queue_t *q) { struct scsi_cmnd *cmd = req->special; + struct scsi_device *sdev = cmd->device; + struct Scsi_Host *shost = sdev->host; blkdev_dequeue_request(req); @@ -1491,6 +1493,19 @@ static void scsi_kill_request(struct request *req, request_queue_t *q) scsi_init_cmd_errh(cmd); cmd->result = DID_NO_CONNECT << 16; atomic_inc(&cmd->device->iorequest_cnt); + + /* + * SCSI request completion path will do scsi_device_unbusy(), + * bump busy counts. To bump the counters, we need to dance + * with the locks as normal issue path does. + */ + sdev->device_busy++; + spin_unlock(sdev->request_queue->queue_lock); + spin_lock(shost->host_lock); + shost->host_busy++; + spin_unlock(shost->host_lock); + spin_lock(sdev->request_queue->queue_lock); + __scsi_done(cmd); } |