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[76.14.218.44]) by smtp.gmail.com with ESMTPSA id k21sm5164664pfi.28.2021.04.16.09.40.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Apr 2021 09:40:15 -0700 (PDT) Date: Fri, 16 Apr 2021 09:40:06 -0700 From: Stephen Hemminger To: Dexuan Cui Cc: davem@davemloft.net, kuba@kernel.org, kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, liuwe@microsoft.com, netdev@vger.kernel.org, leon@kernel.org, andrew@lunn.ch, bernd@petrovitsch.priv.at, rdunlap@infradead.org, shacharr@microsoft.com, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org Subject: Re: [PATCH v7 net-next] net: mana: Add a driver for Microsoft Azure Network Adapter (MANA) Message-ID: <20210416094006.70661f47@hermes.local> In-Reply-To: <20210416060705.21998-1-decui@microsoft.com> References: <20210416060705.21998-1-decui@microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 15 Apr 2021 23:07:05 -0700 Dexuan Cui wrote: > diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c > index 7349a70af083..f682a5572d84 100644 > --- a/drivers/net/hyperv/netvsc_drv.c > +++ b/drivers/net/hyperv/netvsc_drv.c > @@ -2297,6 +2297,7 @@ static struct net_device *get_netvsc_byslot(const struct net_device *vf_netdev) > { > struct device *parent = vf_netdev->dev.parent; > struct net_device_context *ndev_ctx; > + struct net_device *ndev; > struct pci_dev *pdev; > u32 serial; > > @@ -2319,8 +2320,17 @@ static struct net_device *get_netvsc_byslot(const struct net_device *vf_netdev) > if (!ndev_ctx->vf_alloc) > continue; > > - if (ndev_ctx->vf_serial == serial) > - return hv_get_drvdata(ndev_ctx->device_ctx); > + if (ndev_ctx->vf_serial != serial) > + continue; > + > + ndev = hv_get_drvdata(ndev_ctx->device_ctx); > + if (ndev->addr_len != vf_netdev->addr_len || > + memcmp(ndev->perm_addr, vf_netdev->perm_addr, > + ndev->addr_len) != 0) > + continue; > + > + return ndev; > + > } > > netdev_notice(vf_netdev, This probably should be a separate patch. I think it is trying to address the case of VF discovery in Hyper-V/Azure where the reported VF from Hypervisor is bogus or confused.