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[SCSI] ibmvfc: Fix for lost async events

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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>
This commit is contained in:
Brian King 2008-08-15 10:59:23 -05:00 committed by James Bottomley
parent 915be02441
commit cf6f10d794
1 changed files with 11 additions and 7 deletions
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18
drivers/scsi/ibmvscsi/ibmvfc.c
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@ -556,11 +556,12 @@ static void ibmvfc_link_down(struct ibmvfc_host *vhost,
/**
* 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 @@ static void ibmvfc_init_host(struct ibmvfc_host *vhost)
}
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 @@ static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq,
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 @@ static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
/* 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 @@ static void ibmvfc_npiv_login(struct ibmvfc_host *vhost)
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))