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Håkon Bugge authored
In rdma_nl_rcv_skb(), the local variable err is assigned the return value of the supplied callback function, which could be one of ib_nl_handle_resolve_resp(), ib_nl_handle_set_timeout(), or ib_nl_handle_ip_res_resp(). These three functions all return skb->len on success. rdma_nl_rcv_skb() is merely a copy of netlink_rcv_skb(). The callback functions used by the latter have the convention: "Returns 0 on success or a negative error code". In particular, the statement (equal for both functions): if (nlh->nlmsg_flags & NLM_F_ACK || err) implies that rdma_nl_rcv_skb() always will ack a message, independent of the NLM_F_ACK being set in nlmsg_flags or not. The fix could be to change the above statement, but it is better to keep the two *_rcv_skb() functions equal in this respect and instead change the three callback functions in the rdma subsystem to the correct convention. Fixes: 2ca546b9 ("IB/sa: Route SA pathrecord query through netlink") Fixes: ae43f828 ("IB/core: Add IP to GID netlink offload") Link: https://lore.kernel.org/r/20191216120436.3204814-1-haakon.bugge@oracle.comSuggested-by:
Mark Haywood <mark.haywood@oracle.com> Signed-off-by:
Håkon Bugge <haakon.bugge@oracle.com> Tested-by:
Mark Haywood <mark.haywood@oracle.com> Reviewed-by:
Leon Romanovsky <leonro@mellanox.com> Reviewed-by:
Jason Gunthorpe <jgg@mellanox.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
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