4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jian Shen <[email protected]> [ Upstream commit adefc0a2ff465f4ac4a88450fe69d336c8b074c5 ] There is a defect in hclge_ets_validate(). If each member of tc_tsa is not IEEE_8021QAZ_TSA_ETS, the variable total_ets_bw won't be updated. In this case, the check for value of total_ets_bw will fail. This patch fixes it by checking total_ets_bw only after it has been updated. Fixes: cacde272dd00 ("net: hns3: Add hclge_dcb module for the support of DCB feature") Signed-off-by: Jian Shen <[email protected]> Signed-off-by: Peng Li <[email protected]> Signed-off-by: Salil Mehta <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c @@ -79,6 +79,7 @@ static int hclge_ieee_getets(struct hnae static int hclge_ets_validate(struct hclge_dev *hdev, struct ieee_ets *ets, u8 *tc, bool *changed) { + bool has_ets_tc = false; u32 total_ets_bw = 0; u8 max_tc = 0; u8 i; @@ -106,13 +107,14 @@ static int hclge_ets_validate(struct hcl *changed = true; total_ets_bw += ets->tc_tx_bw[i]; - break; + has_ets_tc = true; + break; default: return -EINVAL; } } - if (total_ets_bw != BW_PERCENT) + if (has_ets_tc && total_ets_bw != BW_PERCENT) return -EINVAL; *tc = max_tc + 1;
