** Changed in: linux-azure (Ubuntu Focal)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1896760

Title:
  Mellanox patch for fixing failures in ConnectX3 Pro/DPDK

Status in linux package in Ubuntu:
  Incomplete
Status in linux-azure package in Ubuntu:
  In Progress
Status in linux source package in Focal:
  Incomplete
Status in linux-azure source package in Focal:
  Fix Committed

Bug description:
  [Impact]

  Mellanox has made a patch to fix DPDK failure in Azure with ConnextX3
  pro:

  https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-
  
next.git/commit/drivers/infiniband/hw/mlx4?h=next-20200908&id=ec78b3bd66bc9a015505df0ef0eb153d9e64b03b

  Older kernels don't need this patch. It only affects newer kernels
  with the following patch:

  commit 9012a6de6b43146c934752a60d358c31dbad4368
  Author: Kamal Heib <kh...@redhat.com>
  Date:   Tue May 19 13:12:17 2020 -0400
  [infiniband] IB/core: Fix potential NULL pointer dereference in pkey cache

  If a kernel ships with this patch, it needs the 1st patch.

  [Test Case]

  Boot the current 5.4 linux-azure kernel from focal-updates
  (5.4.0-48.52) on an Azure instance with a mlx4 device without RoCE
  support, the devices are wrongly ignored.

  The expected result is that those devices are created an available.

  [Regression Potential]

  A potential regression would only affect instances running the linux-
  azure 5.4 kernels with mlx4 devices.

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