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Message-ID: <20220517081918.655fe626@hermes.local>
Date: Tue, 17 May 2022 08:19:18 -0700
From: Stephen Hemminger <stephen@...workplumber.org>
To: longli@...uxonhyperv.com
Cc: longli@...rosoft.com, "K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Stephen Hemminger <sthemmin@...rosoft.com>,
Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Leon Romanovsky <leon@...nel.org>,
linux-hyperv@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [PATCH 03/12] net: mana: Handle vport sharing between devices
On Tue, 17 May 2022 02:04:27 -0700
longli@...uxonhyperv.com wrote:
> diff --git a/drivers/net/ethernet/microsoft/mana/mana.h b/drivers/net/ethernet/microsoft/mana/mana.h
> index 51bff91b63ee..26f14fcb6a61 100644
> --- a/drivers/net/ethernet/microsoft/mana/mana.h
> +++ b/drivers/net/ethernet/microsoft/mana/mana.h
> @@ -375,6 +375,7 @@ struct mana_port_context {
> unsigned int num_queues;
>
> mana_handle_t port_handle;
> + atomic_t port_use_count;
Could this be a refcount_t instead?
The refcount_t has protections against under/overflow.
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