[dpdk-dev] [PATCH 1/2] net/virtio: fix unchecked return value
Maxime Coquelin
maxime.coquelin at redhat.com
Fri Nov 9 12:38:05 CET 2018
On 11/7/18 10:01 AM, Tiwei Bie wrote:
> Coverity issue: 302861
> Fixes: 6ba1f63b5ab0 ("virtio: support specification 1.0")
>
> Signed-off-by: Tiwei Bie <tiwei.bie at intel.com>
> ---
> This patch can't be backported because it depends on the
> API change introduced by below commit in this release.
>
> commit e8d435f1f3a1 ("bus/pci: harmonize return value of config read")
>
> drivers/net/virtio/virtio_pci.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
> index 21110cd69..c8883c32e 100644
> --- a/drivers/net/virtio/virtio_pci.c
> +++ b/drivers/net/virtio/virtio_pci.c
> @@ -614,9 +614,15 @@ 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_pci_read_config(dev, &hw->notify_off_multiplier,
> + ret = rte_pci_read_config(dev,
> + &hw->notify_off_multiplier,
> 4, pos + sizeof(cap));
> - hw->notify_base = get_cfg_addr(dev, &cap);
> + if (ret != 4)
> + 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);
>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
Thanks,
Maxime
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