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bnx2x: credit-leakage fixup on vlan_mac_del_all

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Upon insertion of elements into the execution queue, it is validated
that there are enough credits to support additional vlan-macs,
and the credits are consumed. However, when removing a pending
command in `bnx2x_vland_mac_del_all' the consumed credits are not
released, which might cause leakage and eventually the inability to
add new vlan-macs in certain scenarios.

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuval Mintz 2012-01-23 07:31:51 +00:00 committed by David S. Miller
parent 4ec7ac1203
commit 460a25cdae
2 changed files with 54 additions and 1 deletions
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44
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
View file

@ -50,6 +50,7 @@ static inline void bnx2x_exe_queue_init(struct bnx2x *bp,
int exe_len,
union bnx2x_qable_obj *owner,
exe_q_validate validate,
exe_q_remove remove,
exe_q_optimize optimize,
exe_q_execute exec,
exe_q_get get)
@ -66,6 +67,7 @@ static inline void bnx2x_exe_queue_init(struct bnx2x *bp,
/* Owner specific callbacks */
o->validate = validate;
o->remove = remove;
o->optimize = optimize;
o->execute = exec;
o->get = get;
@ -1340,6 +1342,35 @@ static int bnx2x_validate_vlan_mac(struct bnx2x *bp,
}
}
static int bnx2x_remove_vlan_mac(struct bnx2x *bp,
union bnx2x_qable_obj *qo,
struct bnx2x_exeq_elem *elem)
{
int rc = 0;
/* If consumption wasn't required, nothing to do */
if (test_bit(BNX2X_DONT_CONSUME_CAM_CREDIT,
&elem->cmd_data.vlan_mac.vlan_mac_flags))
return 0;
switch (elem->cmd_data.vlan_mac.cmd) {
case BNX2X_VLAN_MAC_ADD:
case BNX2X_VLAN_MAC_MOVE:
rc = qo->vlan_mac.put_credit(&qo->vlan_mac);
break;
case BNX2X_VLAN_MAC_DEL:
rc = qo->vlan_mac.get_credit(&qo->vlan_mac);
break;
default:
return -EINVAL;
}
if (rc != true)
return -EINVAL;
return 0;
}
/**
* bnx2x_wait_vlan_mac - passivly wait for 5 seconds until all work completes.
*
@ -1801,8 +1832,14 @@ static int bnx2x_vlan_mac_del_all(struct bnx2x *bp,
list_for_each_entry_safe(exeq_pos, exeq_pos_n, &exeq->exe_queue, link) {
if (exeq_pos->cmd_data.vlan_mac.vlan_mac_flags ==
*vlan_mac_flags)
*vlan_mac_flags) {
rc = exeq->remove(bp, exeq->owner, exeq_pos);
if (rc) {
BNX2X_ERR("Failed to remove command\n");
return rc;
}
list_del(&exeq_pos->link);
}
}
spin_unlock_bh(&exeq->lock);
@ -1908,6 +1945,7 @@ void bnx2x_init_mac_obj(struct bnx2x *bp,
bnx2x_exe_queue_init(bp,
&mac_obj->exe_queue, 1, qable_obj,
bnx2x_validate_vlan_mac,
bnx2x_remove_vlan_mac,
bnx2x_optimize_vlan_mac,
bnx2x_execute_vlan_mac,
bnx2x_exeq_get_mac);
@ -1924,6 +1962,7 @@ void bnx2x_init_mac_obj(struct bnx2x *bp,
bnx2x_exe_queue_init(bp,
&mac_obj->exe_queue, CLASSIFY_RULES_COUNT,
qable_obj, bnx2x_validate_vlan_mac,
bnx2x_remove_vlan_mac,
bnx2x_optimize_vlan_mac,
bnx2x_execute_vlan_mac,
bnx2x_exeq_get_mac);
@ -1963,6 +2002,7 @@ void bnx2x_init_vlan_obj(struct bnx2x *bp,
bnx2x_exe_queue_init(bp,
&vlan_obj->exe_queue, CLASSIFY_RULES_COUNT,
qable_obj, bnx2x_validate_vlan_mac,
bnx2x_remove_vlan_mac,
bnx2x_optimize_vlan_mac,
bnx2x_execute_vlan_mac,
bnx2x_exeq_get_vlan);
@ -2009,6 +2049,7 @@ void bnx2x_init_vlan_mac_obj(struct bnx2x *bp,
bnx2x_exe_queue_init(bp,
&vlan_mac_obj->exe_queue, 1, qable_obj,
bnx2x_validate_vlan_mac,
bnx2x_remove_vlan_mac,
bnx2x_optimize_vlan_mac,
bnx2x_execute_vlan_mac,
bnx2x_exeq_get_vlan_mac);
@ -2025,6 +2066,7 @@ void bnx2x_init_vlan_mac_obj(struct bnx2x *bp,
&vlan_mac_obj->exe_queue,
CLASSIFY_RULES_COUNT,
qable_obj, bnx2x_validate_vlan_mac,
bnx2x_remove_vlan_mac,
bnx2x_optimize_vlan_mac,
bnx2x_execute_vlan_mac,
bnx2x_exeq_get_vlan_mac);

11
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.h
View file

@ -161,6 +161,10 @@ typedef int (*exe_q_validate)(struct bnx2x *bp,
union bnx2x_qable_obj *o,
struct bnx2x_exeq_elem *elem);
typedef int (*exe_q_remove)(struct bnx2x *bp,
union bnx2x_qable_obj *o,
struct bnx2x_exeq_elem *elem);
/**
* @return positive is entry was optimized, 0 - if not, negative
* in case of an error.
@ -203,11 +207,18 @@ struct bnx2x_exe_queue_obj {
*/
exe_q_validate validate;
/**
* Called before removing pending commands, cleaning allocated
* resources (e.g., credits from validate)
*/
exe_q_remove remove;
/**
* This will try to cancel the current pending commands list
* considering the new command.
*
* Returns the number of optimized commands or a negative error code
*
* Must run under exe_queue->lock
*/
exe_q_optimize optimize;