linux-kernel - [RFC PATCH net-next v1 1/4] vsock/virtio: use skb_frag

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Message-ID: <20231214020530.2267499-2-almasrymina@google.com>
Date:   Wed, 13 Dec 2023 18:05:24 -0800
From:   Mina Almasry <almasrymina@...gle.com>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     Mina Almasry <almasrymina@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
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Subject: [RFC PATCH net-next v1 1/4] vsock/virtio: use skb_frag_page() helper

Minor fix for virtio: code wanting to access the page inside
the skb should use skb_frag_page() helper, instead of accessing
bv_page directly. This allows for extensions where the underlying
memory is not a page.

Signed-off-by: Mina Almasry <almasrymina@...gle.com>

---
 net/vmw_vsock/virtio_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index af5bab1acee1..bd0b413dfa3f 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -153,7 +153,7 @@ virtio_transport_send_pkt_work(struct work_struct *work)
 				 * 'virt_to_phys()' later to fill the buffer descriptor.
 				 * We don't touch memory at "virtual" address of this page.
 				 */
-				va = page_to_virt(skb_frag->bv_page);
+				va = page_to_virt(skb_frag_page(skb_frag));
 				sg_init_one(sgs[out_sg],
 					    va + skb_frag->bv_offset,
 					    skb_frag->bv_len);
-- 
2.43.0.472.g3155946c3a-goog