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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0017888||CentOS-7||kernel||public||2020-11-25 20:13||2020-11-30 20:35|
|Platform||PowerEdge R640||OS||CentOS||OS Version||7.9|
|Target Version||Fixed in Version|
|Summary||0017888: Mellanox MT27710 [ConnectX-4 Lx] NICs unuseable after upgrade to 3.10.0-1160.6.1.el7|
|Description||No traffic is detected on the NIC. Works consistently after rolling back to 3.10.0-1160.2.1.el7. Link seems to go down briefly and then seen coming up again. All other dmesg output matches exactly between kernels. the Nic uses the mlx5_core driver|
|Additional Information||Did notice these changes in 1160.3.1 :|
- [netdrv] net/mlx5e: Modify uplink state on interface up/down (Alaa Hleihel) 
- [netdrv] net/mlx5: E-Switch, Disable esw manager vport correctly (Alaa Hleihel) 
- [netdrv] net/mlx5: E-Switch, Properly refer to host PF vport as other vport (Alaa Hleihel) 
|Tags||No tags attached.|
CentOS is a rebuild of the sources used to create RHEL and aims to reproduce RHEL bug for bug and feature for feature. Please file a ticket against the kernel package at bugzilla.redhat.com and let them know about the regression. If/when RH fixes it and releases a patched version, CentOS will pick it up automatically.
For easier tracking, please crosslink this bug with the one opened at bugzilla.redhat.com.
|@manuelwolfshant I'm not sure how to crosslink ,but the redhat bugzilla id is 1902516|
|Addendum : This seems to only affect mellanox cards with fw < 14.20. Anything that version and higher works fine|