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net: don't check skb_count twice

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NAPI cache skb_count is being checked twice without condition. Change to
checking the second time only if the first check is run.

Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sieng Piaw Liew 2022-06-15 11:24:26 +08:00 committed by David S. Miller
parent 2aa4abed37
commit 49ae83fc4f
1 changed files with 4 additions and 3 deletions
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7
net/core/skbuff.c
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@ -175,13 +175,14 @@ static struct sk_buff *napi_skb_cache_get(void)
struct napi_alloc_cache *nc = this_cpu_ptr(&napi_alloc_cache);
struct sk_buff *skb;
if (unlikely(!nc->skb_count))
if (unlikely(!nc->skb_count)) {
nc->skb_count = kmem_cache_alloc_bulk(skbuff_head_cache,
GFP_ATOMIC,
NAPI_SKB_CACHE_BULK,
nc->skb_cache);
if (unlikely(!nc->skb_count))
return NULL;
if (unlikely(!nc->skb_count))
return NULL;
}
skb = nc->skb_cache[--nc->skb_count];
kasan_unpoison_object_data(skbuff_head_cache, skb);