[SRU][P/N/J:linux-azure][PATCH 0/1] azure: backport ""hv_netvsc: fix loss of early receive events from host during channel open"

[Vinicius Peixoto]

BugLink: https://bugs.launchpad.net/bugs/2127705

[Impact]

A race condition in the hv_netvsc module can lead to a lockup where the RX queue of the network device becomes stuck, degrading the performance for users of the Azure kernel.

[Fix]

The following fix was introduced in 6.17:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9448ccd85336

Backport it to the P/N/J:azure trees (Questing already has it) in order to fix the issue for users of the linux-azure kernel.

[Test plan]

Build tested only; Microsoft will validate the bug fix.

[Where problems could occur]

Issues with this patch could cause hangs, lockups or generally some kind of network performance degradation for virtual machines running on top of Hyper-V.

[Other info]
SF #00418032

Dipayaan Roy (1):
  net: hv_netvsc: fix loss of early receive events from host during
    channel open.

 drivers/net/hyperv/netvsc.c       |  5 ++---
 drivers/net/hyperv/rndis_filter.c | 12 +++++++++---
 2 files changed, 11 insertions(+), 6 deletions(-)

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2.45.2