[SCSI] struct device - replace bus_id with dev_name(), dev_set_name()

[jejb: limit ioctl to returning 20 characters to avoid overrun
       on long device names and add a few more conversions]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index 709a6f7..facc5bfc 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -169,7 +169,7 @@
 		if (res) {
 			printk("sas: driver on pcidev %s cannot handle "
 			       "device %llx, error:%d\n",
-			       sas_ha->dev->bus_id,
+			       dev_name(sas_ha->dev),
 			       SAS_ADDR(dev->sas_addr), res);
 		}
 	}