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[SCSI] isci: remove bus and reset handlers 

Remove ->eh_device_reset_handler() and ->eh_bus_reset_handler() for the
same reason they are not implemented for libata hosts, they cannot be
implemented reliably with ata-eh.  ATA error recovery wants to divert
all resets to the eh thread and wait for completion, these handlers may
be invoked from a non-blocking ioctl.

The other path they are called from is libsas-eh, and if we escalate
past I_T_nexus reset we have larger problems i.e. tear down all
in-flight commands in the domain potentially without notification to the
lldd if it has chosen not to implement ->lldd_clear_nexus_port() /
->lldd_clear_nexus_ha().

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams 2011-12-08 00:37:25 -08:00 committed by James Bottomley
parent 687833a03b
commit 6a719391e4
3 changed files with 0 additions and 27 deletions
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2
drivers/scsi/isci/init.c
View File

@ -165,8 +165,6 @@ static struct scsi_host_template isci_sht = {
.sg_tablesize = SG_ALL,
.max_sectors = SCSI_DEFAULT_MAX_SECTORS,
.use_clustering = ENABLE_CLUSTERING,
.eh_device_reset_handler = sas_eh_device_reset_handler,
.eh_bus_reset_handler = isci_bus_reset_handler,
.slave_alloc = sas_slave_alloc,
.target_destroy = sas_target_destroy,
.ioctl = sas_ioctl,

23
drivers/scsi/isci/task.c
View File

@ -1322,26 +1322,3 @@ int isci_task_I_T_nexus_reset(struct domain_device *dev)
isci_put_device(idev);
return ret;
}
int isci_bus_reset_handler(struct scsi_cmnd *cmd)
{
struct domain_device *dev = sdev_to_domain_dev(cmd->device);
struct isci_host *ihost = dev_to_ihost(dev);
struct isci_remote_device *idev;
unsigned long flags;
int ret;
spin_lock_irqsave(&ihost->scic_lock, flags);
idev = isci_lookup_device(dev);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
if (!idev) {
ret = TMF_RESP_FUNC_COMPLETE;
goto out;
}
ret = isci_reset_device(ihost, dev, idev);
out:
isci_put_device(idev);
return ret;
}

2
drivers/scsi/isci/task.h
View File

@ -208,8 +208,6 @@ int isci_queuecommand(
struct scsi_cmnd *scsi_cmd,
void (*donefunc)(struct scsi_cmnd *));
int isci_bus_reset_handler(struct scsi_cmnd *cmd);
/**
* enum isci_completion_selection - This enum defines the possible actions to
* take with respect to a given request's notification back to libsas.