From: Björn Töpel <bjorn.topel@xxxxxxxxx>
Calculating the "data_hard_end" for an XDP buffer coming from AF_XDP
zero-copy mode, the return value of xsk_umem_xdp_frame_sz() is added
to "data_hard_start".
Currently, the chunk size of the UMEM is returned by
xsk_umem_xdp_frame_sz(). This is not correct, if the fixed UMEM
headroom is non-zero. Fix this by returning the chunk_size without the
UMEM headroom.
Fixes: 2a637c5b1aaf ("xdp: For Intel AF_XDP drivers add XDP frame_sz")
Signed-off-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
---
include/net/xdp_sock.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
index abd72de25fa4..6b1137ce1692 100644
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -239,7 +239,7 @@ static inline u64 xsk_umem_adjust_offset(struct xdp_umem *umem, u64 address,
static inline u32 xsk_umem_xdp_frame_sz(struct xdp_umem *umem)
{
- return umem->chunk_size_nohr + umem->headroom;
+ return umem->chunk_size_nohr;
}
#else
--
2.25.1
