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Message-ID: <ad8817bf-50fd-5dee-1540-bae10c55d9f4@huawei.com> Date: Tue, 7 Nov 2023 15:45:24 +0800 From: Yunsheng Lin <linyunsheng@...wei.com> To: Mina Almasry <almasrymina@...gle.com>, <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-arch@...r.kernel.org>, <linux-kselftest@...r.kernel.org>, <linux-media@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>, <linaro-mm-sig@...ts.linaro.org> CC: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Jesper Dangaard Brouer <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, Arnd Bergmann <arnd@...db.de>, David Ahern <dsahern@...nel.org>, Willem de Bruijn <willemdebruijn.kernel@...il.com>, Shuah Khan <shuah@...nel.org>, Sumit Semwal <sumit.semwal@...aro.org>, Christian König <christian.koenig@....com>, Shakeel Butt <shakeelb@...gle.com>, Jeroen de Borst <jeroendb@...gle.com>, Praveen Kaligineedi <pkaligineedi@...gle.com>, Willem de Bruijn <willemb@...gle.com>, Kaiyuan Zhang <kaiyuanz@...gle.com> Subject: Re: [RFC PATCH v3 05/12] netdev: netdevice devmem allocator On 2023/11/6 10:44, Mina Almasry wrote: > + > +void netdev_free_devmem(struct page_pool_iov *ppiov) > +{ > + struct netdev_dmabuf_binding *binding = page_pool_iov_binding(ppiov); > + > + refcount_set(&ppiov->refcount, 1); > + > + if (gen_pool_has_addr(binding->chunk_pool, > + page_pool_iov_dma_addr(ppiov), PAGE_SIZE)) When gen_pool_has_addr() returns false, does it mean something has gone really wrong here? > + gen_pool_free(binding->chunk_pool, > + page_pool_iov_dma_addr(ppiov), PAGE_SIZE); > + > + netdev_devmem_binding_put(binding); > +} > + > void netdev_unbind_dmabuf(struct netdev_dmabuf_binding *binding) > { > struct netdev_rx_queue *rxq; >
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