Re: [dpdk-stable] [PATCH] vdpa/ifc: check return value for PCI config read

["Xia, Chenbo" <chenbo.xia@intel.com>]

> -----Original Message-----
> From: Wang, Xiao W <xiao.w.wang@intel.com>
> Sent: Tuesday, March 9, 2021 4:43 PM
> To: Xia, Chenbo <chenbo.xia@intel.com>
> Cc: dev@dpdk.org; Wang, Xiao W <xiao.w.wang@intel.com>; stable@dpdk.org
> Subject: [PATCH] vdpa/ifc: check return value for PCI config read
> 
> The return value of rte_pci_read_config should be checked.
> 
> Coverity issue: 302860
> Fixes: a3f8150eac6d ("net/ifcvf: add ifcvf vDPA driver")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
> ---
>  drivers/vdpa/ifc/base/ifcvf.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
> index 3c0b2dff66..721cb1da8a 100644
> --- a/drivers/vdpa/ifc/base/ifcvf.c
> +++ b/drivers/vdpa/ifc/base/ifcvf.c
> @@ -65,8 +65,13 @@ ifcvf_init_hw(struct ifcvf_hw *hw, PCI_DEV *dev)
>  			hw->common_cfg = get_cap_addr(hw, &cap);
>  			break;
>  		case IFCVF_PCI_CAP_NOTIFY_CFG:
> -			PCI_READ_CONFIG_DWORD(dev, &hw->notify_off_multiplier,
> +			ret = PCI_READ_CONFIG_DWORD(dev,
> +					&hw->notify_off_multiplier,
>  					pos + sizeof(cap));
> +			if (ret < 0) {
> +				DEBUGOUT("failed to read notify_off_multiplier\n");
> +				return -1;
> +			}
>  			hw->notify_base = get_cap_addr(hw, &cap);
>  			hw->notify_region = cap.bar;
>  			break;
> --
> 2.15.1

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>