linux-kernel - Re: [PATCH] media: amphion: Slightly simplify vpu_core

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <99029039e6887b1660c897b25c3792253b477a52.camel@ndufresne.ca>
Date: Tue, 22 Apr 2025 17:23:09 -0400
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>, Ming Qian
	 <ming.qian@....com>, Zhou Peng <eagle.zhou@....com>, Mauro Carvalho Chehab
	 <mchehab@...nel.org>
Cc: linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org, 
	linux-media@...r.kernel.org
Subject: Re: [PATCH] media: amphion: Slightly simplify vpu_core_register()

Le vendredi 18 avril 2025 à 00:01 +0200, Christophe JAILLET a écrit :
> "vpu_core->msg_buffer_size" is unused out-side of vpu_core_register().
> There is no need to save this value in struct vpu_core.
> 
> Remove it and use a local variable instead.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

thanks,
Nicolas

> ---
>  drivers/media/platform/amphion/vpu.h      | 1 -
>  drivers/media/platform/amphion/vpu_core.c | 7 ++++---
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/platform/amphion/vpu.h b/drivers/media/platform/amphion/vpu.h
> index 22f0da26ccec..1451549c9dd2 100644
> --- a/drivers/media/platform/amphion/vpu.h
> +++ b/drivers/media/platform/amphion/vpu.h
> @@ -162,7 +162,6 @@ struct vpu_core {
>  	struct delayed_work msg_delayed_work;
>  	struct kfifo msg_fifo;
>  	void *msg_buffer;
> -	unsigned int msg_buffer_size;
>  
>  	struct vpu_dev *vpu;
>  	void *iface;
> diff --git a/drivers/media/platform/amphion/vpu_core.c b/drivers/media/platform/amphion/vpu_core.c
> index 8df85c14ab3f..da00f5fc0e5d 100644
> --- a/drivers/media/platform/amphion/vpu_core.c
> +++ b/drivers/media/platform/amphion/vpu_core.c
> @@ -250,6 +250,7 @@ static void vpu_core_get_vpu(struct vpu_core *core)
>  static int vpu_core_register(struct device *dev, struct vpu_core *core)
>  {
>  	struct vpu_dev *vpu = dev_get_drvdata(dev);
> +	unsigned int buffer_size;
>  	int ret = 0;
>  
>  	dev_dbg(core->dev, "register core %s\n", vpu_core_type_desc(core->type));
> @@ -263,14 +264,14 @@ static int vpu_core_register(struct device *dev, struct vpu_core *core)
>  	}
>  	INIT_WORK(&core->msg_work, vpu_msg_run_work);
>  	INIT_DELAYED_WORK(&core->msg_delayed_work, vpu_msg_delayed_work);
> -	core->msg_buffer_size = roundup_pow_of_two(VPU_MSG_BUFFER_SIZE);
> -	core->msg_buffer = vzalloc(core->msg_buffer_size);
> +	buffer_size = roundup_pow_of_two(VPU_MSG_BUFFER_SIZE);
> +	core->msg_buffer = vzalloc(buffer_size);
>  	if (!core->msg_buffer) {
>  		dev_err(core->dev, "failed allocate buffer for fifo\n");
>  		ret = -ENOMEM;
>  		goto error;
>  	}
> -	ret = kfifo_init(&core->msg_fifo, core->msg_buffer, core->msg_buffer_size);
> +	ret = kfifo_init(&core->msg_fifo, core->msg_buffer, buffer_size);
>  	if (ret) {
>  		dev_err(core->dev, "failed init kfifo\n");
>  		goto error;