[dpdk-stable] patch 'net/virtio: fix unchecked return value' has been queued to LTS release 16.11.9

[Tiwei Bie]

On Mon, Nov 19, 2018 at 12:25:25PM +0000, Luca Boccassi wrote:
> Hi,
> 
> FYI, your patch has been queued to LTS release 16.11.9
> 
> Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
> It will be pushed if I get no objections before 11/21/18. So please
> shout if anyone has objections.
> 
> Also note that after the patch there's a diff of the upstream commit vs the patch applied
> to the branch. If the code is different (ie: not only metadata diffs), due for example to
> a change in context or macro names, please double check it.
> 
> Thanks.
> 
> Luca Boccassi
> 
> ---
> From 87b9d321789f9bdaa2cf11df2f7377bc1145e7fa Mon Sep 17 00:00:00 2001
> From: Tiwei Bie <tiwei.bie at intel.com>
> Date: Wed, 7 Nov 2018 17:01:01 +0800
> Subject: [PATCH] net/virtio: fix unchecked return value
> 
> [ upstream commit ecfae1510edc1391285aa566a2d31e7eae8fc6d2 ]
> 
> Coverity issue: 302861
> Fixes: 6ba1f63b5ab0 ("virtio: support specification 1.0")
> 
> Signed-off-by: Tiwei Bie <tiwei.bie at intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
> ---
>  drivers/net/virtio/virtio_pci.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
> index f6d697f38..13ad57dfd 100644
> --- a/drivers/net/virtio/virtio_pci.c
> +++ b/drivers/net/virtio/virtio_pci.c
> @@ -690,9 +690,15 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw)
>  			hw->common_cfg = get_cfg_addr(dev, &cap);
>  			break;
>  		case VIRTIO_PCI_CAP_NOTIFY_CFG:
> -			rte_eal_pci_read_config(dev, &hw->notify_off_multiplier,
> -						4, pos + sizeof(cap));
> -			hw->notify_base = get_cfg_addr(dev, &cap);
> +			ret = rte_eal_pci_read_config(dev,
> +					&hw->notify_off_multiplier,
> +					4, pos + sizeof(cap));
> +			if (ret != 4)

Hi Luca,

This patch can't be backported, because it depends on an
API change in newer release.

Thanks


> +				PMD_INIT_LOG(DEBUG,
> +					"failed to read notify_off_multiplier, ret %d",
> +					ret);
> +			else
> +				hw->notify_base = get_cfg_addr(dev, &cap);
>  			break;
>  		case VIRTIO_PCI_CAP_DEVICE_CFG:
>  			hw->dev_cfg = get_cfg_addr(dev, &cap);
> -- 
> 2.19.1
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