linux-kernel - Re: [PATCH V4 net 2/3] net: hns3: fix kernel crash when devlink reload during pf initialization

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Message-ID: <20240326112238.GM403975@kernel.org>
Date: Tue, 26 Mar 2024 11:22:38 +0000
From: Simon Horman <horms@...nel.org>
To: Jijie Shao <shaojijie@...wei.com>
Cc: yisen.zhuang@...wei.com, salil.mehta@...wei.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	michal.kubiak@...el.com, rkannoth@...vell.com, jiri@...nulli.us,
	shenjian15@...wei.com, wangjie125@...wei.com,
	liuyonglong@...wei.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 net 2/3] net: hns3: fix kernel crash when devlink
 reload during pf initialization

On Mon, Mar 25, 2024 at 08:43:10PM +0800, Jijie Shao wrote:
> From: Yonglong Liu <liuyonglong@...wei.com>
> 
> The devlink reload process will access the hardware resources,
> but the register operation is done before the hardware is initialized.
> So, processing the devlink reload during initialization may lead to kernel
> crash. This patch fixes this by taking devl_lock during initialization.
> 
> Fixes: b741269b2759 ("net: hns3: add support for registering devlink for PF")
> Signed-off-by: Yonglong Liu <liuyonglong@...wei.com>
> Signed-off-by: Jijie Shao <shaojijie@...wei.com>

Reviewed-by: Simon Horman <horms@...nel.org>