linux-kernel - Re: [PATCH] media: uvcvideo: fix build error in uvc_ctrl_cleanup

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Message-ID: <CANiDSCu83Ky-604gu2Yt34Wj1Km6Xh+TcPYzQxKZJNWdT7=m8A@mail.gmail.com>
Date: Mon, 30 Jun 2025 17:15:38 +0200
From: Ricardo Ribalda <ribalda@...omium.org>
To: Desnes Nunes <desnesn@...hat.com>
Cc: laurent.pinchart@...asonboard.com, hansg@...nel.org, 
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org
Subject: Re: [PATCH] media: uvcvideo: fix build error in uvc_ctrl_cleanup_fh

Hi Desdes

How did you trigger this build warning? I believe we use C11

https://www.kernel.org/doc/html/latest/process/programming-language.html


Regards!

On Mon, 30 Jun 2025 at 17:07, Desnes Nunes <desnesn@...hat.com> wrote:
>
> This fixes the following compilation failure: "error: ‘for’ loop
> initial declarations are only allowed in C99 or C11 mode"
>
> Cc: stable@...r.kernel.org
> Fixes: 221cd51efe45 ("media: uvcvideo: Remove dangling pointers")
> Signed-off-by: Desnes Nunes <desnesn@...hat.com>
> ---
>  drivers/media/usb/uvc/uvc_ctrl.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index 44b6513c5264..532615d8484b 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -3260,7 +3260,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
>  void uvc_ctrl_cleanup_fh(struct uvc_fh *handle)
>  {
>         struct uvc_entity *entity;
> -       int i;
> +       unsigned int i;
>
>         guard(mutex)(&handle->chain->ctrl_mutex);
>
> @@ -3268,7 +3268,7 @@ void uvc_ctrl_cleanup_fh(struct uvc_fh *handle)
>                 return;
>
>         list_for_each_entry(entity, &handle->chain->dev->entities, list) {
> -               for (unsigned int i = 0; i < entity->ncontrols; ++i) {
> +               for (i = 0; i < entity->ncontrols; ++i) {
>                         if (entity->controls[i].handle != handle)
>                                 continue;
>                         uvc_ctrl_set_handle(handle, &entity->controls[i], NULL);
> --
> 2.49.0
>
>


-- 
Ricardo Ribalda