netdev - Re: [PATCH net 2/2] net: hibmcge: fix wrong ndo.open() after reset fail issue.

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Message-ID: <743a78cc-10d4-45f0-9c46-f021258b577d@huawei.com>
Date: Wed, 14 May 2025 10:40:26 +0800
From: Jijie Shao <shaojijie@...wei.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: <shaojijie@...wei.com>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<pabeni@...hat.com>, <andrew+netdev@...n.ch>, <horms@...nel.org>,
	<shenjian15@...wei.com>, <wangpeiyang1@...wei.com>, <liuyonglong@...wei.com>,
	<chenhao418@...wei.com>, <jonathan.cameron@...wei.com>,
	<shameerali.kolothum.thodi@...wei.com>, <salil.mehta@...wei.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net 2/2] net: hibmcge: fix wrong ndo.open() after reset
 fail issue.


on 2025/5/1 22:23, Jakub Kicinski wrote:
> On Wed, 30 Apr 2025 17:31:27 +0800 Jijie Shao wrote:
>> If the driver reset fails, it may not work properly.
>> Therefore, the ndo.open() operation should be rejected.
> Why not call netif_device_detach() if the reset failed and let the core
> code handle blocking the callbacks?

Hi:

If driver call netif_device_detach() after reset failed,
The network port cannot be operated. and I can't re-do the reset.
So how does the core code handle blocking callbacks?
Is there a good time to call netif_device_attach()?

Or I need to implement pci_error_handlers.resume()?


[root@...alhost sjj]# ethtool --reset enp132s0f1 dedicated
ETHTOOL_RESET 0xffff
Cannot issue ETHTOOL_RESET: Device or resource busy
[root@...alhost sjj]# ethtool --reset enp132s0f1 dedicated
ETHTOOL_RESET 0xffff
Cannot issue ETHTOOL_RESET: No such device
[root@...alhost sjj]# ifconfig enp132s0f1 up
SIOCSIFFLAGS: No such device

Thanks,
Jijie Shao