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authorHaiyang Zhang <haiyangz@microsoft.com>2020-02-06 23:01:05 +0100
committerDavid S. Miller <davem@davemloft.net>2020-02-07 11:33:01 +0100
commit184367dce4f744bde54377203305ccc8889aa79f (patch)
treec2d9b5c2ef577f04482af7065944b71f5ddc0fe0 /drivers/net/phy
parentMerge branch 'taprio-Some-fixes' (diff)
downloadlinux-184367dce4f744bde54377203305ccc8889aa79f.tar.xz
linux-184367dce4f744bde54377203305ccc8889aa79f.zip
hv_netvsc: Fix XDP refcnt for synthetic and VF NICs
The caller of XDP_SETUP_PROG has already incremented refcnt in __bpf_prog_get(), so drivers should only increment refcnt by num_queues - 1. To fix the issue, update netvsc_xdp_set() to add the correct number to refcnt. Hold a refcnt in netvsc_xdp_set()’s other caller, netvsc_attach(). And, do the same in netvsc_vf_setxdp(). Otherwise, every time when VF is removed and added from the host side, the refcnt will be decreased by one, which may cause page fault when unloading xdp program. Fixes: 351e1581395f ("hv_netvsc: Add XDP support") Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy')
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