[SCSI] ibmvfc: Fix for lost async events
If the client virtual fibre channel adapter is already logged into the
server and does an NPIV Login again, the async queue, which is used for
reporting Link Up/Link Down type of events, does not get reset on the
server side. Fix up the client driver so that we also do not reset it.
This fixes a problem of lost async events following relogins.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 406ab27..58f8c9e 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -556,11 +556,12 @@
/**
* ibmvfc_init_host - Start host initialization
* @vhost: ibmvfc host struct
+ * @relogin: is this a re-login?
*
* Return value:
* nothing
**/
-static void ibmvfc_init_host(struct ibmvfc_host *vhost)
+static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin)
{
struct ibmvfc_target *tgt;
@@ -574,6 +575,11 @@
}
if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) {
+ if (!relogin) {
+ memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
+ vhost->async_crq.cur = 0;
+ }
+
list_for_each_entry(tgt, &vhost->targets, queue)
tgt->need_login = 1;
scsi_block_requests(vhost->host);
@@ -2084,11 +2090,11 @@
case IBMVFC_AE_LINK_UP:
case IBMVFC_AE_RESUME:
vhost->events_to_log |= IBMVFC_AE_LINKUP;
- ibmvfc_init_host(vhost);
+ ibmvfc_init_host(vhost, 1);
break;
case IBMVFC_AE_SCN_FABRIC:
vhost->events_to_log |= IBMVFC_AE_RSCN;
- ibmvfc_init_host(vhost);
+ ibmvfc_init_host(vhost, 1);
break;
case IBMVFC_AE_SCN_NPORT:
case IBMVFC_AE_SCN_GROUP:
@@ -2134,13 +2140,13 @@
/* Send back a response */
rc = ibmvfc_send_crq_init_complete(vhost);
if (rc == 0)
- ibmvfc_init_host(vhost);
+ ibmvfc_init_host(vhost, 0);
else
dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc);
break;
case IBMVFC_CRQ_INIT_COMPLETE:
dev_info(vhost->dev, "Partner initialization complete\n");
- ibmvfc_init_host(vhost);
+ ibmvfc_init_host(vhost, 0);
break;
default:
dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format);
@@ -3358,8 +3364,6 @@
mad->buffer.va = vhost->login_buf_dma;
mad->buffer.len = sizeof(*vhost->login_buf);
- memset(vhost->async_crq.msgs, 0, PAGE_SIZE);
- vhost->async_crq.cur = 0;
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT);
if (!ibmvfc_send_event(evt, vhost, default_timeout))