[SCSI] sd: fix issue_flush
sd_issue_flush() is called from atomic context so we can't use the
semaphore based routines to get a reference to the scsi_disk. Assume
something else already got the reference so we can safely use it.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index bb5b242..8613a13 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -769,20 +769,16 @@
static int sd_prepare_flush(request_queue_t *q, struct request *rq)
{
struct scsi_device *sdev = q->queuedata;
- struct scsi_disk *sdkp = scsi_disk_get_from_dev(&sdev->sdev_gendev);
- int ret = 0;
+ struct scsi_disk *sdkp = dev_get_drvdata(&sdev->sdev_gendev);
- if (sdkp) {
- if (sdkp->WCE) {
- memset(rq->cmd, 0, sizeof(rq->cmd));
- rq->flags |= REQ_BLOCK_PC | REQ_SOFTBARRIER;
- rq->timeout = SD_TIMEOUT;
- rq->cmd[0] = SYNCHRONIZE_CACHE;
- ret = 1;
- }
- scsi_disk_put(sdkp);
- }
- return ret;
+ if (!sdkp || !sdkp->WCE)
+ return 0;
+
+ memset(rq->cmd, 0, sizeof(rq->cmd));
+ rq->flags |= REQ_BLOCK_PC | REQ_SOFTBARRIER;
+ rq->timeout = SD_TIMEOUT;
+ rq->cmd[0] = SYNCHRONIZE_CACHE;
+ return 1;
}
static void sd_rescan(struct device *dev)
