+ /* we need to evaluate the error return */
+ if (scsi_sense_valid(&sshdr) &&
+ /* 0x3a is medium not present */
+ sshdr.asc == 0x3a)
+ /* this is no error here */
+ return 0;
+
+ switch (host_byte(res)) {
+ /* ignore errors due to racing a disconnection */
+ case DID_BAD_TARGET:
+ case DID_NO_CONNECT:
+ return 0;
+ /* signal the upper layer it might try again */
+ case DID_BUS_BUSY:
+ case DID_IMM_RETRY:
+ case DID_REQUEUE:
+ case DID_SOFT_ERROR:
+ return -EBUSY;
+ default:
+ return -EIO;
+ }