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authorJames Bottomley <James.Bottomley@steeleye.com>2007-03-16 22:44:41 (GMT)
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2007-03-20 15:56:49 (GMT)
commit6c5f8ce1fb7e8925d957f754a9513911399791b9 (patch)
tree700bd0e02ed3bd704049abed2d7113f40c9e3467 /include/scsi
parent03d4433721880bf1972c924b168e4e1dd3c59d53 (diff)
downloadlinux-6c5f8ce1fb7e8925d957f754a9513911399791b9.tar.xz
[SCSI] expose eh_timed_out to the host template
It looks like megaraid_sas at least needs this to throttle its commands as they begin to time out. The code keeps the existing transport template use of eh_timed_out (and allows the transport to override the host if they both have this callback). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_host.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 965b6b8..68f461b 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -326,6 +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 *);