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qlcnic: fix rcv buffer leak 

Rcv producer value should be read in spin-lock.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Kumar Salecha 2010-04-22 02:51:40 +00:00 committed by David S. Miller
parent ade91f8ec9
commit ed6f1353e1
1 changed files with 5 additions and 3 deletions
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8
drivers/net/qlcnic/qlcnic_init.c
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@ -1554,9 +1554,10 @@ qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, u32 ringid,
int producer, count = 0;
struct list_head *head;
spin_lock(&rds_ring->lock);
producer = rds_ring->producer;
spin_lock(&rds_ring->lock);
head = &rds_ring->free_list;
while (!list_empty(head)) {
@ -1578,13 +1579,13 @@ qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, u32 ringid,
producer = get_next_index(producer, rds_ring->num_desc);
}
spin_unlock(&rds_ring->lock);
if (count) {
rds_ring->producer = producer;
writel((producer-1) & (rds_ring->num_desc-1),
rds_ring->crb_rcv_producer);
}
spin_unlock(&rds_ring->lock);
}
static void
@ -1596,10 +1597,11 @@ qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
int producer, count = 0;
struct list_head *head;
producer = rds_ring->producer;
if (!spin_trylock(&rds_ring->lock))
return;
producer = rds_ring->producer;
head = &rds_ring->free_list;
while (!list_empty(head)) {