lpfc: Fix host reset escalation killing all IOs.
Fix host reset escalation killing all IOs.
SLI-3 adapters will use a new host template. The template differs
from SLI-4 adapters in that it does not have an eh_host_reset_handler.
Lpfc has traditionally never had a host_reset. The host reset
handler was added when we ran into a stuck hardware condition on a
SLI-4 adapter. The host_reset will reset and reinit the pci function,
clearing the hardware condition.
Unfortunately, the host reset handler uses attach/detach code paths,
which makes scsi_add_host() and scsi_remove_host() calls. Meaning, a
host_reset will completely remove the scsi_host from the system. As a
new call to scsi_add_host() is made, the shost# changes, which results
in completely new scsi_devices and device names. All the older scsi
devices on the old shost# are now orphaned and unrecoverable.
We realize we need to re-implement the host_reset_handler so the scsi_host
stays registered across the host_reset, but that will be a rather
lengthy effort. In the short term, we had an immediate need to restore
the SLI-3 devices to their working behavior, with the easiest path being
to remove their host_reset handler.
Signed-off-by: Dick Kennedy <dick.kennedy@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 4ba91af..74672e0 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -3257,12 +3257,17 @@
struct Scsi_Host *shost;
int error = 0;
- if (dev != &phba->pcidev->dev)
+ if (dev != &phba->pcidev->dev) {
shost = scsi_host_alloc(&lpfc_vport_template,
sizeof(struct lpfc_vport));
- else
- shost = scsi_host_alloc(&lpfc_template,
+ } else {
+ if (phba->sli_rev == LPFC_SLI_REV4)
+ shost = scsi_host_alloc(&lpfc_template,
sizeof(struct lpfc_vport));
+ else
+ shost = scsi_host_alloc(&lpfc_template_s3,
+ sizeof(struct lpfc_vport));
+ }
if (!shost)
goto out;