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qcacmn: Track available ext descriptors in the pool

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Check for available ext descriptors before accessing freelist.

Change-Id: Iaeea9c7b3b69d14d53bcc23054ebd309b8be2ea9
CRs-Fixed: 2148174
This commit is contained in:
Manjunathappa Prakash
2017-11-22 14:09:33 -08:00
committed by snandini
parent bd894b3bb9
commit 98b30de852
1 changed files with 6 additions and 0 deletions
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6
dp/wifi3.0/dp_tx_desc.h
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@@ -368,9 +368,14 @@ struct dp_tx_ext_desc_elem_s *dp_tx_ext_desc_alloc(struct dp_soc *soc,
struct dp_tx_ext_desc_elem_s *c_elem; struct dp_tx_ext_desc_elem_s *c_elem;
TX_DESC_LOCK_LOCK(&soc->tx_ext_desc[desc_pool_id].lock); TX_DESC_LOCK_LOCK(&soc->tx_ext_desc[desc_pool_id].lock);
if (soc->tx_ext_desc[desc_pool_id].num_free <= 0) {
TX_DESC_LOCK_UNLOCK(&soc->tx_ext_desc[desc_pool_id].lock);
return NULL;
}
c_elem = soc->tx_ext_desc[desc_pool_id].freelist; c_elem = soc->tx_ext_desc[desc_pool_id].freelist;
soc->tx_ext_desc[desc_pool_id].freelist = soc->tx_ext_desc[desc_pool_id].freelist =
soc->tx_ext_desc[desc_pool_id].freelist->next; soc->tx_ext_desc[desc_pool_id].freelist->next;
soc->tx_ext_desc[desc_pool_id].num_free--;
TX_DESC_LOCK_UNLOCK(&soc->tx_ext_desc[desc_pool_id].lock); TX_DESC_LOCK_UNLOCK(&soc->tx_ext_desc[desc_pool_id].lock);
return c_elem; return c_elem;
} }
@@ -389,6 +394,7 @@ static inline void dp_tx_ext_desc_free(struct dp_soc *soc,
TX_DESC_LOCK_LOCK(&soc->tx_ext_desc[desc_pool_id].lock); TX_DESC_LOCK_LOCK(&soc->tx_ext_desc[desc_pool_id].lock);
elem->next = soc->tx_ext_desc[desc_pool_id].freelist; elem->next = soc->tx_ext_desc[desc_pool_id].freelist;
soc->tx_ext_desc[desc_pool_id].freelist = elem; soc->tx_ext_desc[desc_pool_id].freelist = elem;
soc->tx_ext_desc[desc_pool_id].num_free++;
TX_DESC_LOCK_UNLOCK(&soc->tx_ext_desc[desc_pool_id].lock); TX_DESC_LOCK_UNLOCK(&soc->tx_ext_desc[desc_pool_id].lock);
return; return;
} }