Re: [PATCH v6 01/16] PCI/DPC: Initialize aer_err_info before using it

Ilpo Järvinen
2025-05-20T09:39:47Z

On Mon, 19 May 2025, Bjorn Helgaas wrote:

> From: Bjorn Helgaas <bhelgaas@google.com>
>
> Previously the struct aer_err_info "info" was allocated on the stack
> without being initialized, so it contained junk except for the fields we
> explicitly set later.
>
> Initialize "info" at declaration so it starts as all zeroes.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
> drivers/pci/pcie/dpc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
> index df42f15c9829..fe7719238456 100644
> --- a/drivers/pci/pcie/dpc.c
> +++ b/drivers/pci/pcie/dpc.c
> @@ -258,7 +258,7 @@ static int dpc_get_aer_uncorrect_severity(struct pci_dev *dev,
> void dpc_process_error(struct pci_dev *pdev)
> {
> u16 cap = pdev->dpc_cap, status, source, reason, ext_reason;
> - struct aer_err_info info;
> + struct aer_err_info info = { 0 };

= {}; is enough to initialize it, no need to add those zeros.

>
> pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
> pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &source);
>

--
i.