Revision 0b41d6ca616ddeb3b6c0a80e8770b6f53cd42806 authored by Nicholas Bellinger on 18 September 2013, 19:48:27 UTC, committed by Nicholas Bellinger on 02 October 2013, 04:27:30 UTC
This patch fixes a bug where ib_destroy_cm_id() was incorrectly being called after srpt_destroy_ch_ib() had destroyed the active QP. This would result in the following failed SRP_LOGIN_REQ messages: Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff1762bd, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c903009f8f41) Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff1758f9, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 2 (guid=0xfe80000000000000:0x2c903009f8f42) Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff175941, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 2 (guid=0xfe80000000000000:0x2c90300a3cfb2) Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff176299, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c90300a3cfb1) mlx4_core 0000:84:00.0: command 0x19 failed: fw status = 0x9 rejected SRP_LOGIN_REQ because creating a new RDMA channel failed. Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff176299, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c90300a3cfb1) mlx4_core 0000:84:00.0: command 0x19 failed: fw status = 0x9 rejected SRP_LOGIN_REQ because creating a new RDMA channel failed. Received SRP_LOGIN_REQ with i_port_id 0x0:0x2590ffff176299, t_port_id 0x2c903009f8f40:0x2c903009f8f40 and it_iu_len 260 on port 1 (guid=0xfe80000000000000:0x2c90300a3cfb1) Reported-by: Navin Ahuja <navin.ahuja@saratoga-speed.com> Cc: stable@vger.kernel.org # 3.3+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
1 parent 3e9e01d
list_lru.c
/*
* Copyright (c) 2013 Red Hat, Inc. and Parallels Inc. All rights reserved.
* Authors: David Chinner and Glauber Costa
*
* Generic LRU infrastructure
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/list_lru.h>
#include <linux/slab.h>
bool list_lru_add(struct list_lru *lru, struct list_head *item)
{
int nid = page_to_nid(virt_to_page(item));
struct list_lru_node *nlru = &lru->node[nid];
spin_lock(&nlru->lock);
WARN_ON_ONCE(nlru->nr_items < 0);
if (list_empty(item)) {
list_add_tail(item, &nlru->list);
if (nlru->nr_items++ == 0)
node_set(nid, lru->active_nodes);
spin_unlock(&nlru->lock);
return true;
}
spin_unlock(&nlru->lock);
return false;
}
EXPORT_SYMBOL_GPL(list_lru_add);
bool list_lru_del(struct list_lru *lru, struct list_head *item)
{
int nid = page_to_nid(virt_to_page(item));
struct list_lru_node *nlru = &lru->node[nid];
spin_lock(&nlru->lock);
if (!list_empty(item)) {
list_del_init(item);
if (--nlru->nr_items == 0)
node_clear(nid, lru->active_nodes);
WARN_ON_ONCE(nlru->nr_items < 0);
spin_unlock(&nlru->lock);
return true;
}
spin_unlock(&nlru->lock);
return false;
}
EXPORT_SYMBOL_GPL(list_lru_del);
unsigned long
list_lru_count_node(struct list_lru *lru, int nid)
{
unsigned long count = 0;
struct list_lru_node *nlru = &lru->node[nid];
spin_lock(&nlru->lock);
WARN_ON_ONCE(nlru->nr_items < 0);
count += nlru->nr_items;
spin_unlock(&nlru->lock);
return count;
}
EXPORT_SYMBOL_GPL(list_lru_count_node);
unsigned long
list_lru_walk_node(struct list_lru *lru, int nid, list_lru_walk_cb isolate,
void *cb_arg, unsigned long *nr_to_walk)
{
struct list_lru_node *nlru = &lru->node[nid];
struct list_head *item, *n;
unsigned long isolated = 0;
spin_lock(&nlru->lock);
restart:
list_for_each_safe(item, n, &nlru->list) {
enum lru_status ret;
/*
* decrement nr_to_walk first so that we don't livelock if we
* get stuck on large numbesr of LRU_RETRY items
*/
if (--(*nr_to_walk) == 0)
break;
ret = isolate(item, &nlru->lock, cb_arg);
switch (ret) {
case LRU_REMOVED:
if (--nlru->nr_items == 0)
node_clear(nid, lru->active_nodes);
WARN_ON_ONCE(nlru->nr_items < 0);
isolated++;
break;
case LRU_ROTATE:
list_move_tail(item, &nlru->list);
break;
case LRU_SKIP:
break;
case LRU_RETRY:
/*
* The lru lock has been dropped, our list traversal is
* now invalid and so we have to restart from scratch.
*/
goto restart;
default:
BUG();
}
}
spin_unlock(&nlru->lock);
return isolated;
}
EXPORT_SYMBOL_GPL(list_lru_walk_node);
int list_lru_init(struct list_lru *lru)
{
int i;
size_t size = sizeof(*lru->node) * nr_node_ids;
lru->node = kzalloc(size, GFP_KERNEL);
if (!lru->node)
return -ENOMEM;
nodes_clear(lru->active_nodes);
for (i = 0; i < nr_node_ids; i++) {
spin_lock_init(&lru->node[i].lock);
INIT_LIST_HEAD(&lru->node[i].list);
lru->node[i].nr_items = 0;
}
return 0;
}
EXPORT_SYMBOL_GPL(list_lru_init);
void list_lru_destroy(struct list_lru *lru)
{
kfree(lru->node);
}
EXPORT_SYMBOL_GPL(list_lru_destroy);
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