linux-kernel - Re: [PATCH 2/9] media: cx18: use GFP

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Date:   Fri, 18 Feb 2022 15:26:20 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Julia Lawall <Julia.Lawall@...ia.fr>
Cc:     Andy Walls <awalls@...metrocast.net>,
        kernel-janitors@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/9] media: cx18: use GFP_KERNEL

On Thu, Feb 10, 2022 at 09:42:16PM +0100, Julia Lawall wrote:
> Pci_driver probe functions aren't called with locks held
> and thus don't need GFP_ATOMIC. Use GFP_KERNEL instead.
> 
> Problem found with Coccinelle.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...ia.fr>
> 
> ---
>  drivers/media/pci/cx18/cx18-driver.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/pci/cx18/cx18-driver.c b/drivers/media/pci/cx18/cx18-driver.c
> index 59497ba6bf1f..1be9672ae9d4 100644
> --- a/drivers/media/pci/cx18/cx18-driver.c
> +++ b/drivers/media/pci/cx18/cx18-driver.c
> @@ -899,7 +899,7 @@ static int cx18_probe(struct pci_dev *pci_dev,
>  		return -ENOMEM;

Unrelated to your patch but every error path in this function ought to
call atomic_dec(&cx18_instance);

regards,
dan carpenter