+ error = k;
+
+ out:
+ if (error < 0)
+ kfree(sdp);
+ kfree(old_sg_dev_arr);
+ return error;
+
+ expand_failed:
+ printk(KERN_WARNING "sg_alloc: device array cannot be resized\n");
+ error = -ENOMEM;
+ goto out;
+
+ overflow:
+ write_unlock_irqrestore(&sg_dev_arr_lock, iflags);
+ printk(KERN_WARNING
+ "Unable to attach sg device <%d, %d, %d, %d> type=%d, minor "
+ "number exceeds %d\n", scsidp->host->host_no, scsidp->channel,
+ scsidp->id, scsidp->lun, scsidp->type, SG_MAX_DEVS - 1);
+ error = -ENODEV;
+ goto out;
+}
+
+static int
+sg_add(struct class_device *cl_dev)
+{
+ struct scsi_device *scsidp = to_scsi_device(cl_dev->dev);
+ struct gendisk *disk;
+ Sg_device *sdp = NULL;
+ struct cdev * cdev = NULL;
+ int error, k;
+
+ disk = alloc_disk(1);
+ if (!disk) {
+ printk(KERN_WARNING "alloc_disk failed\n");
+ return -ENOMEM;
+ }
+ disk->major = SCSI_GENERIC_MAJOR;
+
+ error = -ENOMEM;
+ cdev = cdev_alloc();
+ if (!cdev) {
+ printk(KERN_WARNING "cdev_alloc failed\n");
+ goto out;
+ }
+ cdev->owner = THIS_MODULE;
+ cdev->ops = &sg_fops;
+
+ error = sg_alloc(disk, scsidp);
+ if (error < 0) {
+ printk(KERN_WARNING "sg_alloc failed\n");
+ goto out;
+ }
+ k = error;
+ sdp = sg_dev_arr[k];