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be2net: clear & notify residual events before destroying event queues

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Any events rcvd after interrupts are disabled (in the driver unload path),
must be cleared and notified before the event queues are destroyed

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sathya Perla 2009-08-10 03:43:51 +00:00 committed by David S. Miller
parent cdab23b701
commit 859b1e4ec8
1 changed files with 56 additions and 29 deletions
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85
drivers/net/benet/be_main.c
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@ -993,6 +993,56 @@ static void be_tx_compl_process(struct be_adapter *adapter, u16 last_index)
kfree_skb(sent_skb);
}
static inline struct be_eq_entry *event_get(struct be_eq_obj *eq_obj)
{
struct be_eq_entry *eqe = queue_tail_node(&eq_obj->q);
if (!eqe->evt)
return NULL;
eqe->evt = le32_to_cpu(eqe->evt);
queue_tail_inc(&eq_obj->q);
return eqe;
}
static int event_handle(struct be_adapter *adapter,
struct be_eq_obj *eq_obj)
{
struct be_eq_entry *eqe;
u16 num = 0;
while ((eqe = event_get(eq_obj)) != NULL) {
eqe->evt = 0;
num++;
}
/* Deal with any spurious interrupts that come
* without events
*/
be_eq_notify(adapter, eq_obj->q.id, true, true, num);
if (num)
napi_schedule(&eq_obj->napi);
return num;
}
/* Just read and notify events without processing them.
* Used at the time of destroying event queues */
static void be_eq_clean(struct be_adapter *adapter,
struct be_eq_obj *eq_obj)
{
struct be_eq_entry *eqe;
u16 num = 0;
while ((eqe = event_get(eq_obj)) != NULL) {
eqe->evt = 0;
num++;
}
if (num)
be_eq_notify(adapter, eq_obj->q.id, false, true, num);
}
static void be_rx_q_clean(struct be_adapter *adapter)
{
struct be_rx_page_info *page_info;
@ -1114,6 +1164,9 @@ static void be_tx_queues_destroy(struct be_adapter *adapter)
be_cmd_q_destroy(adapter, q, QTYPE_CQ);
be_queue_free(adapter, q);
/* Clear any residual events */
be_eq_clean(adapter, &adapter->tx_eq);
q = &adapter->tx_eq.q;
if (q->created)
be_cmd_q_destroy(adapter, q, QTYPE_EQ);
@ -1185,6 +1238,9 @@ static void be_rx_queues_destroy(struct be_adapter *adapter)
be_cmd_q_destroy(adapter, q, QTYPE_CQ);
be_queue_free(adapter, q);
/* Clear any residual events */
be_eq_clean(adapter, &adapter->rx_eq);
q = &adapter->rx_eq.q;
if (q->created)
be_cmd_q_destroy(adapter, q, QTYPE_EQ);
@ -1251,35 +1307,6 @@ static int be_rx_queues_create(struct be_adapter *adapter)
be_queue_free(adapter, eq);
return rc;
}
static bool event_get(struct be_eq_obj *eq_obj, u16 *rid)
{
struct be_eq_entry *entry = queue_tail_node(&eq_obj->q);
u32 evt = entry->evt;
if (!evt)
return false;
evt = le32_to_cpu(evt);
*rid = (evt >> EQ_ENTRY_RES_ID_SHIFT) & EQ_ENTRY_RES_ID_MASK;
entry->evt = 0;
queue_tail_inc(&eq_obj->q);
return true;
}
static int event_handle(struct be_adapter *adapter, struct be_eq_obj *eq_obj)
{
u16 rid = 0, num = 0;
while (event_get(eq_obj, &rid))
num++;
/* We can see an interrupt and no event */
be_eq_notify(adapter, eq_obj->q.id, true, true, num);
if (num)
napi_schedule(&eq_obj->napi);
return num;
}
static irqreturn_t be_intx(int irq, void *dev)
{