Re: [PATCH v2 1/2] PCI: vmd: Fix one uninitialized symbol error reported by Smatch

Patel, Nirmal
2023-04-21T00:00:00Z

On 4/20/2023 2:43 AM, korantwork@gmail.com wrote:
> From: Xinghui Li <korantli@tencent.com>
>
> There is one uninitialized symbol error reported by smatch:
> "drivers/pci/controller/vmd.c:931 vmd_enable_domain()
> error: uninitialized symbol 'ret'."
>
> Fix it by assigning ret with pci_reset_bus return.
>
> Fixes: 0a584655ef89 ("PCI: vmd: Fix secondary bus reset for Intel bridges")
> Reported-by: Dan Carpenter <error27@gmail.com>
> Signed-off-by: Xinghui Li <korantli@tencent.com>
> ---
> drivers/pci/controller/vmd.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
> index 990630ec57c6..1a36e9a52b93 100644
> --- a/drivers/pci/controller/vmd.c
> +++ b/drivers/pci/controller/vmd.c
> @@ -927,7 +927,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features)
> if (!list_empty(&child->devices)) {
> dev = list_first_entry(&child->devices,
> struct pci_dev, bus_list);
> - if (pci_reset_bus(dev))
> + ret = pci_reset_bus(dev);
> + if (ret)
> pci_warn(dev, "can't reset device: %d\n", ret);
>
> break;

Reviewed-by: Nirmal Patel <nirmal.patel@linux.intel.com>