Re: [PATCH v2 net] net: fix premature exit from NAPI state polling in napi_disable()

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Wed, 10 Nov 2021 20:56:05 +0100 you wrote:
> Commit 719c57197010 ("net: make napi_disable() symmetric with
> enable") accidentally introduced a bug sometimes leading to a kernel
> BUG when bringing an iface up/down under heavy traffic load.
> 
> Prior to this commit, napi_disable() was polling n->state until
> none of (NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC) is set and then
> always flip them. Now there's a possibility to get away with the
> NAPIF_STATE_SCHE unset as 'continue' drops us to the cmpxchg()
> call with an unitialized variable, rather than straight to
> another round of the state check.
> 
> [...]

Here is the summary with links:
  - [v2,net] net: fix premature exit from NAPI state polling in napi_disable()
    https://git.kernel.org/netdev/net/c/0315a075f134

You are awesome, thank you!
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