1 files changed, 18 insertions, 14 deletions

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 7f1f411d07af..68f461b7a835 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -129,6 +129,11 @@ struct scsi_host_template {
          * the LLD. When the driver is finished processing the command
          * the done callback is invoked.
          *
+         * This is called to inform the LLD to transfer
+         * cmd->request_bufflen bytes. The cmd->use_sg speciefies the
+         * number of scatterlist entried in the command and
+         * cmd->request_buffer contains the scatterlist.
+         *
          * return values: see queuecommand
          *
          * If the LLD accepts the cmd, it should set the result to an
@@ -139,20 +144,6 @@ struct scsi_host_template {
         /* TODO: rename */
         int (* transfer_response)(struct scsi_cmnd *,
                                   void (*done)(struct scsi_cmnd *));
-        /*
-         * This is called to inform the LLD to transfer cmd->request_bufflen
-         * bytes of the cmd at cmd->offset in the cmd. The cmd->use_sg
-         * speciefies the number of scatterlist entried in the command
-         * and cmd->request_buffer contains the scatterlist.
-         *
-         * If the command cannot be processed in one transfer_data call
-         * becuase a scatterlist within the LLD's limits cannot be
-         * created then transfer_data will be called multiple times.
-         * It is initially called from process context, and later
-         * calls are from the interrup context.
-         */
-        int (* transfer_data)(struct scsi_cmnd *,
-                              void (*done)(struct scsi_cmnd *));
 
         /* Used as callback for the completion of task management request. */
         int (* tsk_mgmt_response)(u64 mid, int result);
@@ -335,6 +326,19 @@ struct scsi_host_template {
         int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
 
         /*
+         * This is an optional routine that allows the transport to become
+         * involved when a scsi io timer fires. The return value tells the
+         * timer routine how to finish the io timeout handling:
+         * EH_HANDLED:          I fixed the error, please complete the command
+         * EH_RESET_TIMER:      I need more time, reset the timer and
+         *                      begin counting again
+         * EH_NOT_HANDLED       Begin normal error recovery
+         *
+         * Status: OPTIONAL
+         */
+        enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *);
+
+        /*
          * suspend support
          */
         int (*resume)(struct scsi_device *);