linux-kernel - Re: [PATCH v7 01/17] PCI/DPC: Initialize aer_err

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Message-ID: <b74260bc-9991-1590-91e1-97e77ae0fa41@linux.intel.com>
Date: Wed, 21 May 2025 13:06:25 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Bjorn Helgaas <helgaas@...nel.org>
cc: linux-pci@...r.kernel.org, Jon Pan-Doh <pandoh@...gle.com>, 
    Karolina Stolarek <karolina.stolarek@...cle.com>, 
    Weinan Liu <wnliu@...gle.com>, 
    Martin Petersen <martin.petersen@...cle.com>, 
    Ben Fuller <ben.fuller@...cle.com>, Drew Walton <drewwalton@...rosoft.com>, 
    Anil Agrawal <anilagrawal@...a.com>, Tony Luck <tony.luck@...el.com>, 
    Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@...ux.intel.com>, 
    Lukas Wunner <lukas@...ner.de>, 
    Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
    Sargun Dhillon <sargun@...a.com>, "Paul E . McKenney" <paulmck@...nel.org>, 
    Mahesh J Salgaonkar <mahesh@...ux.ibm.com>, 
    Oliver O'Halloran <oohall@...il.com>, Kai-Heng Feng <kaihengf@...dia.com>, 
    Keith Busch <kbusch@...nel.org>, Robert Richter <rrichter@....com>, 
    Terry Bowman <terry.bowman@....com>, Shiju Jose <shiju.jose@...wei.com>, 
    Dave Jiang <dave.jiang@...el.com>, LKML <linux-kernel@...r.kernel.org>, 
    linuxppc-dev@...ts.ozlabs.org, Bjorn Helgaas <bhelgaas@...gle.com>, 
    Krzysztof Wilczyński <kwilczynski@...nel.org>
Subject: Re: [PATCH v7 01/17] PCI/DPC: Initialize aer_err_info before using
 it

On Tue, 20 May 2025, Bjorn Helgaas wrote:

> From: Bjorn Helgaas <bhelgaas@...gle.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 zeros.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> Tested-by: Krzysztof Wilczyński <kwilczynski@...nel.org>
> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.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..3daaf61c79c9 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 = {};
>  
>  	pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
>  	pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &source);
> 

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
 i.