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Subject: Re: [PATCH V2 net] hv_netvsc: Fix race condition between netvsc_probe and
 netvsc_remove
From: patchwork-bot+netdevbpf@kernel.org
Message-Id: 
 <170680562683.32005.9726914174097287156.git-patchwork-notify@kernel.org>
Date: Thu, 01 Feb 2024 16:40:26 +0000
References: <1706686551-28510-1-git-send-email-schakrabarti@linux.microsoft.com>
In-Reply-To: <1706686551-28510-1-git-send-email-schakrabarti@linux.microsoft.com>
To: Souradeep Chakrabarti <schakrabarti@linux.microsoft.com>
Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
 decui@microsoft.com, davem@davemloft.net, edumazet@google.com,
 kuba@kernel.org, pabeni@redhat.com, longli@microsoft.com,
 yury.norov@gmail.com, leon@kernel.org, cai.huoqing@linux.dev,
 ssengar@linux.microsoft.com, vkuznets@redhat.com, tglx@linutronix.de,
 linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org,
 schakrabarti@microsoft.com, stable@vger.kernel.org

Hello:

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

On Tue, 30 Jan 2024 23:35:51 -0800 you wrote:
> In commit ac5047671758 ("hv_netvsc: Disable NAPI before closing the
> VMBus channel"), napi_disable was getting called for all channels,
> including all subchannels without confirming if they are enabled or not.
> 
> This caused hv_netvsc getting hung at napi_disable, when netvsc_probe()
> has finished running but nvdev->subchan_work has not started yet.
> netvsc_subchan_work() -> rndis_set_subchannel() has not created the
> sub-channels and because of that netvsc_sc_open() is not running.
> netvsc_remove() calls cancel_work_sync(&nvdev->subchan_work), for which
> netvsc_subchan_work did not run.
> 
> [...]

Here is the summary with links:
  - [V2,net] hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove
    https://git.kernel.org/netdev/net/c/e0526ec5360a

You are awesome, thank you!
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