SCSI: improve two error messages

This trivial patch (as1338) makes two uninformative error messages in
scsi_sysfs_add_sdev() more explicit.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/scsi/scsi_sysfs.c

@@ -864,13 +864,15 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
 
 	error = device_add(&sdev->sdev_gendev);
 	if (error) {
-		printk(KERN_INFO "error 1\n");
+		sdev_printk(KERN_INFO, sdev,
+				"failed to add device: %d\n", error);
 		return error;
 	}
 	device_enable_async_suspend(&sdev->sdev_dev);
 	error = device_add(&sdev->sdev_dev);
 	if (error) {
-		printk(KERN_INFO "error 2\n");
+		sdev_printk(KERN_INFO, sdev,
+				"failed to add class device: %d\n", error);
 		device_del(&sdev->sdev_gendev);
 		return error;
 	}