diff options
| author | James Bottomley <James.Bottomley@steeleye.com> | 2007-03-16 17:44:41 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-03-20 10:56:49 -0500 |
| commit | 6c5f8ce1fb7e8925d957f754a9513911399791b9 (patch) | |
| tree | 700bd0e02ed3bd704049abed2d7113f40c9e3467 | |
| parent | 03d4433721880bf1972c924b168e4e1dd3c59d53 (diff) | |
[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>
| -rw-r--r-- | drivers/scsi/scsi_error.c | 11 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 13 |
2 files changed, 23 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index b8edcf5b545..7a1a1bb1341 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -184,10 +184,19 @@ int scsi_delete_timer(struct scsi_cmnd *scmd) **/ void scsi_times_out(struct scsi_cmnd *scmd) { + enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *); + scsi_log_completion(scmd, TIMEOUT_ERROR); if (scmd->device->host->transportt->eh_timed_out) - switch (scmd->device->host->transportt->eh_timed_out(scmd)) { + eh_timed_out = scmd->device->host->transportt->eh_timed_out; + else if (scmd->device->host->hostt->eh_timed_out) + eh_timed_out = scmd->device->host->hostt->eh_timed_out; + else + eh_timed_out = NULL; + + if (eh_timed_out) + switch (eh_timed_out(scmd)) { case EH_HANDLED: __scsi_done(scmd); return; diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 965b6b8ffec..68f461b7a83 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 *); |