linux-kernel - Re: [PATCH] video: fbdev: au1100fb: Check before some function not needed

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: <6c572704-b39d-34cf-345f-9bd21a18be5b@gmx.de>
Date:   Mon, 20 Jun 2022 20:18:08 +0200
From:   Helge Deller <deller@....de>
To:     Yihao Han <hanyihao@...o.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] video: fbdev: au1100fb: Check before some function not
 needed

On 6/8/22 13:43, Yihao Han wrote:
> clk_disable() already checks the clk ptr using IS_ERR_OR_NULL(clk)
> and clk_enable() checks the clk ptr using !clk, so there is no
> need to check clk ptr again before calling them.
>
> Signed-off-by: Yihao Han <hanyihao@...o.com>

applied to fbdev tree.

Thanks!
Helge

> ---
>  drivers/video/fbdev/au1100fb.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
> index 52f731a61482..519313b8bb00 100644
> --- a/drivers/video/fbdev/au1100fb.c
> +++ b/drivers/video/fbdev/au1100fb.c
> @@ -560,8 +560,7 @@ int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
>  	/* Blank the LCD */
>  	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
>
> -	if (fbdev->lcdclk)
> -		clk_disable(fbdev->lcdclk);
> +	clk_disable(fbdev->lcdclk);
>
>  	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
>
> @@ -577,8 +576,7 @@ int au1100fb_drv_resume(struct platform_device *dev)
>
>  	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
>
> -	if (fbdev->lcdclk)
> -		clk_enable(fbdev->lcdclk);
> +	clk_enable(fbdev->lcdclk);
>
>  	/* Unblank the LCD */
>  	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);