netdev - Re: [PATCH v3 07/10] net/mlx5: Use RMW accessors for changing LNKCTL

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <ZJMNPzvvRenBH1ur@corigine.com>
Date: Wed, 21 Jun 2023 16:46:23 +0200
From: Simon Horman <simon.horman@...igine.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Lukas Wunner <lukas@...ner.de>, Saeed Mahameed <saeedm@...dia.com>,
	Leon Romanovsky <leon@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Moshe Shemesh <moshe@...lanox.com>, netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dean Luick <dean.luick@...nelisnetworks.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Moshe Shemesh <moshe@...dia.com>, stable@...r.kernel.org
Subject: Re: [PATCH v3 07/10] net/mlx5: Use RMW accessors for changing LNKCTL

On Tue, Jun 20, 2023 at 04:46:21PM +0300, Ilpo Järvinen wrote:
> Don't assume that only the driver would be accessing LNKCTL of the
> upstream bridge. ASPM policy changes can trigger write to LNKCTL
> outside of driver's control.
> 
> Use RMW capability accessors which do proper locking to avoid losing
> concurrent updates to the register value.
> 
> Fixes: eabe8e5e88f5 ("net/mlx5: Handle sync reset now event")
> Suggested-by: Lukas Wunner <lukas@...ner.de>
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> Reviewed-by: Moshe Shemesh <moshe@...dia.com>
> Cc: stable@...r.kernel.org
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)

Reviewed-by: Simon Horman <simon.horman@...igine.com>