diff options
| author | Jie Wang <wangjie125@huawei.com> | 2022-04-12 05:01:20 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-04-15 21:41:45 +0300 |
| commit | bde292c07b480e23137060dad83cca24d55c4cc4 (patch) | |
| tree | 5106c0fc4f46524cfc3d69f19c991ff4dad3de50 /net/ethtool | |
| parent | 4dc84c06a343fcb95fd5a0acb537aefa4ebdd1b0 (diff) | |
| download | linux-bde292c07b480e23137060dad83cca24d55c4cc4.tar.xz | |
net: ethtool: move checks before rtnl_lock() in ethnl_set_rings
Currently these two checks in ethnl_set_rings are added after rtnl_lock()
which will do useless works if the request is invalid.
So this patch moves these checks before the rtnl_lock() to avoid these
costs.
Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ethtool')
| -rw-r--r-- | net/ethtool/rings.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c index 9ed60c507d97..fa3ec8d438f7 100644 --- a/net/ethtool/rings.c +++ b/net/ethtool/rings.c @@ -152,6 +152,24 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info) if (!ops->get_ringparam || !ops->set_ringparam) goto out_dev; + if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] && + !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) { + ret = -EOPNOTSUPP; + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_RINGS_RX_BUF_LEN], + "setting rx buf len not supported"); + goto out_dev; + } + + if (tb[ETHTOOL_A_RINGS_CQE_SIZE] && + !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) { + ret = -EOPNOTSUPP; + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_RINGS_CQE_SIZE], + "setting cqe size not supported"); + goto out_dev; + } + if (tb[ETHTOOL_A_RINGS_TX_PUSH] && !(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) { ret = -EOPNOTSUPP; @@ -201,24 +219,6 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info) goto out_ops; } - if (kernel_ringparam.rx_buf_len != 0 && - !(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) { - ret = -EOPNOTSUPP; - NL_SET_ERR_MSG_ATTR(info->extack, - tb[ETHTOOL_A_RINGS_RX_BUF_LEN], - "setting rx buf len not supported"); - goto out_ops; - } - - if (kernel_ringparam.cqe_size && - !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) { - ret = -EOPNOTSUPP; - NL_SET_ERR_MSG_ATTR(info->extack, - tb[ETHTOOL_A_RINGS_CQE_SIZE], - "setting cqe size not supported"); - goto out_ops; - } - ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, &kernel_ringparam, info->extack); if (ret < 0) |