[SCSI] scsi_dh: add infrastructure for SCSI Device Handlers
[linux-2.6.git] / drivers / scsi / scsi_error.c
index eaf5a8a..006a959 100644 (file)
@@ -298,6 +298,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,
  */
 static int scsi_check_sense(struct scsi_cmnd *scmd)
 {
+       struct scsi_device *sdev = scmd->device;
        struct scsi_sense_hdr sshdr;
 
        if (! scsi_command_normalize_sense(scmd, &sshdr))
@@ -306,6 +307,16 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
        if (scsi_sense_is_deferred(&sshdr))
                return NEEDS_RETRY;
 
+       if (sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh &&
+                       sdev->scsi_dh_data->scsi_dh->check_sense) {
+               int rc;
+
+               rc = sdev->scsi_dh_data->scsi_dh->check_sense(sdev, &sshdr);
+               if (rc != SCSI_RETURN_NOT_HANDLED)
+                       return rc;
+               /* handler does not care. Drop down to default handling */
+       }
+
        /*
         * Previous logic looked for FILEMARK, EOM or ILI which are
         * mainly associated with tapes and returned SUCCESS.