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RDMA/hns: WARN_ON if get a reserved sl from users

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According to the RoCE v1 specification, the sl (service level) 0-7 are
mapped directly to priorities 0-7 respectively, sl 8-15 are reserved. The
driver should verify whether the value of sl is larger than 7, if so, an
exception should be returned.

Link: https://lore.kernel.org/r/1607650657-35992-6-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Weihang Li 2020-12-11 09:37:31 +08:00 committed by Jason Gunthorpe
parent 94a8c4dfcd
commit f75506833e
1 changed files with 4 additions and 0 deletions
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4
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
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@ -433,6 +433,10 @@ static int fill_ud_av(struct hns_roce_v2_ud_send_wqe *ud_sq_wqe,
V2_UD_SEND_WQE_BYTE_36_TCLASS_S, ah->av.tclass);
roce_set_field(ud_sq_wqe->byte_40, V2_UD_SEND_WQE_BYTE_40_FLOW_LABEL_M,
V2_UD_SEND_WQE_BYTE_40_FLOW_LABEL_S, ah->av.flowlabel);
if (WARN_ON(ah->av.sl > MAX_SERVICE_LEVEL))
return -EINVAL;
roce_set_field(ud_sq_wqe->byte_40, V2_UD_SEND_WQE_BYTE_40_SL_M,
V2_UD_SEND_WQE_BYTE_40_SL_S, ah->av.sl);