linux-kernel - RE: [PATCH] net: mana: store return status in signed variable

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Message-ID: <PH7PR21MB32635C66722888A108A51198CE5C9@PH7PR21MB3263.namprd21.prod.outlook.com>
Date:   Thu, 6 Oct 2022 01:48:36 +0000
From:   Long Li <longli@...rosoft.com>
To:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Ajay Sharma <sharmaajay@...rosoft.com>
CC:     "kernel@...labora.com" <kernel@...labora.com>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] net: mana: store return status in signed variable

> Subject: [PATCH] net: mana: store return status in signed variable
> 
> [Some people who received this message don't often get email from
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> 
> The mana_adev_idx_alloc() can return negative value. Save its return value
> in ret which is signed variable and check if it is correct value.
> 
> Fixes: ee928282bfa7 ("net: mana: Add support for auxiliary device")
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---
>  drivers/net/ethernet/microsoft/mana/mana_en.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c
> b/drivers/net/ethernet/microsoft/mana/mana_en.c
> index 7ca313c7b7b3..1c59502d34b5 100644
> --- a/drivers/net/ethernet/microsoft/mana/mana_en.c
> +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
> @@ -2203,11 +2203,10 @@ static int add_adev(struct gdma_dev *gd)
>                 return -ENOMEM;
> 
>         adev = &madev->adev;
> -       adev->id = mana_adev_idx_alloc();
> -       if (adev->id < 0) {
> -               ret = adev->id;
> +       ret = mana_adev_idx_alloc();
> +       if (ret < 0)
>                 goto idx_fail;
> -       }
> +       adev->id = ret;
> 
>         adev->name = "rdma";
>         adev->dev.parent = gd->gdma_context->dev;
> --
> 2.30.2

Thank you, I'm folding this patch into the next v7 patch series.

Long