Hi,Andrew Rybchenko
On 2020/1/17 15:57, Andrew Rybchenko wrote:
On 1/17/20 9:23 AM, Wei Hu (Xavier) wrote:
From: "Wei Hu (Xavier)" <xavier.hu...@huawei.com>
I think summary is misleading. It is too generic and does not
mention VLAN offloads. Consider something like:
ethdev: fix VLAN offloads set if no driver callback
Currently, there is a potential problem that changing the content of
dev->data->dev_conf.rxmode.offloads even when the pointer named
dev->dev_ops->vlan_offload_set is NULL in the API function named
rte_eth_dev_set_vlan_offload.
Consider to change
"when the pointer named dev->dev_ops->vlan_offload_set is NULL in the
API function named rte_eth_dev_set_vlan_offload." to "when there is no
vlan_offload_set driver callback."
It is a good idea that prevent the side effect and make the API return
success if no change requested. This patch fixes the problem, the detail
information as below:
- Update a local 'dev_offloads' variable, instead of directly updating the
device config data
- if no change requested, "mask == 0", return success
- if change requested, check the 'vlan_offload_set' dev_ops in this stage
- assign the local 'dev_offloads' to 'dev->data->dev_conf.rxmode.offloads'
and call the dev_ops
- On error recover the 'dev->data->dev_conf.rxmode.offloads' to
'orig_offloads'
I see no point to repeat in description what the code does.
IMHO it is sufficient to mention main ideas:
- keep possibility to do dummy set even if there is no driver
callback
- do not touch Rx mode offloads in device data before
checking the driver callback availability
- ensure that Rx mode offloads are rolled back correctly if
driver callback returns error
Fixes: 01eb53eefeb4 ("ethdev: rename folder to library name")
I think it is wrong Fixes. Rename just moves the code, it is
not the changeset which introduces the bug.
Cc: sta...@dpdk.org
Signed-off-by: Wei Hu (Xavier) <xavier.hu...@huawei.com>
Signed-off-by: Chunsong Feng <fengchuns...@huawei.com>
Signed-off-by: Min Wang (Jushui) <wangm...@huawei.com>
Signed-off-by: Min Hu (Connor) <humi...@huawei.com>
with above notes processed
Reviewed-by: Andrew Rybchenko <arybche...@solarflare.com>
Thanks for your comments, I will update it and send V3.
Regards
Xavier
