diff options
Diffstat (limited to 'net/core/page_pool.c')
| -rw-r--r-- | net/core/page_pool.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 4011eb305cee..ba7cf3e3c32f 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -153,9 +153,9 @@ u64 *page_pool_ethtool_stats_get(u64 *data, const void *stats) EXPORT_SYMBOL(page_pool_ethtool_stats_get); #else -#define alloc_stat_inc(pool, __stat) -#define recycle_stat_inc(pool, __stat) -#define recycle_stat_add(pool, __stat, val) +#define alloc_stat_inc(...) do { } while (0) +#define recycle_stat_inc(...) do { } while (0) +#define recycle_stat_add(...) do { } while (0) #endif static bool page_pool_producer_lock(struct page_pool *pool) @@ -741,19 +741,16 @@ void page_pool_return_page(struct page_pool *pool, netmem_ref netmem) static bool page_pool_recycle_in_ring(struct page_pool *pool, netmem_ref netmem) { - int ret; - /* BH protection not needed if current is softirq */ - if (in_softirq()) - ret = ptr_ring_produce(&pool->ring, (__force void *)netmem); - else - ret = ptr_ring_produce_bh(&pool->ring, (__force void *)netmem); + bool in_softirq, ret; - if (!ret) { + /* BH protection not needed if current is softirq */ + in_softirq = page_pool_producer_lock(pool); + ret = !__ptr_ring_produce(&pool->ring, (__force void *)netmem); + if (ret) recycle_stat_inc(pool, ring); - return true; - } + page_pool_producer_unlock(pool, in_softirq); - return false; + return ret; } /* Only allow direct recycling in special circumstances, into the @@ -1150,10 +1147,14 @@ static void page_pool_scrub(struct page_pool *pool) static int page_pool_release(struct page_pool *pool) { + bool in_softirq; int inflight; page_pool_scrub(pool); inflight = page_pool_inflight(pool, true); + /* Acquire producer lock to make sure producers have exited. */ + in_softirq = page_pool_producer_lock(pool); + page_pool_producer_unlock(pool, in_softirq); if (!inflight) __page_pool_destroy(pool); |