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-rw-r--r--include/scsi/scsi_host.h16
1 files changed, 14 insertions, 2 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index cc139dbd71e5..31e0d6ca1eba 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -80,8 +80,10 @@ struct scsi_host_template {
* command block to the LLDD. When the driver finished
* processing the command the done callback is invoked.
*
- * If queuecommand returns 0, then the HBA has accepted the
- * command. The done() function must be called on the command
+ * If queuecommand returns 0, then the driver has accepted the
+ * command. It must also push it to the HBA if the scsi_cmnd
+ * flag SCMD_LAST is set, or if the driver does not implement
+ * commit_rqs. The done() function must be called on the command
* when the driver has finished with it. (you may call done on the
* command before queuecommand returns, but in this case you
* *must* return 0 from queuecommand).
@@ -110,6 +112,16 @@ struct scsi_host_template {
int (* queuecommand)(struct Scsi_Host *, struct scsi_cmnd *);
/*
+ * The commit_rqs function is used to trigger a hardware
+ * doorbell after some requests have been queued with
+ * queuecommand, when an error is encountered before sending
+ * the request with SCMD_LAST set.
+ *
+ * STATUS: OPTIONAL
+ */
+ void (*commit_rqs)(struct Scsi_Host *, u16);
+
+ /*
* This is an error handling strategy routine. You don't need to
* define one of these if you don't want to - there is a default
* routine that is present that should work in most cases. For those