linux-kernel - Re: [PATCH v2 -next] media: atomisp: Remove unneeded if-null-free check

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Message-ID: <3753626.ARhKoE1mID@linux.local>
Date:   Wed, 02 Jun 2021 21:23:18 +0200
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Zheng Yongjun <zhengyongjun3@...wei.com>
Cc:     sakari.ailus@...ux.intel.com, gregkh@...uxfoundation.org,
        Zheng Yongjun <zhengyongjun3@...wei.com>
Subject: Re: [PATCH v2 -next] media: atomisp: Remove unneeded if-null-free check

On Wednesday, June 2, 2021 3:45:47 AM CEST Zheng Yongjun wrote:
> Eliminate the following coccicheck warning:
> 
> drivers/staging/media/atomisp/pci/sh_css_firmware.c:367:4-10: WARNING:
> NULL check before some freeing functions is not needed.
> drivers/staging/media/atomisp/pci/sh_css_firmware.c:369:4-10: WARNING:
> NULL check before some freeing functions is not needed.
> 
> Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
> ---
>  drivers/staging/media/atomisp/pci/sh_css_firmware.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
This warning has already been fixed on May 27th (with the only exception of 
the removal of the unneeded cast):

[PATCH] staging: media: atomisp: pci: Remove checks before kfree/kvfree
https://lore.kernel.org/lkml/20210527193922.25225-1-fmdefrancesco@gmail.com/

Fabio
>
> diff --git a/drivers/staging/media/atomisp/pci/sh_css_firmware.c
> b/drivers/staging/media/atomisp/pci/sh_css_firmware.c index 
f4ce8ace9d50..5301cc014c7e
> 100644
> --- a/drivers/staging/media/atomisp/pci/sh_css_firmware.c
> +++ b/drivers/staging/media/atomisp/pci/sh_css_firmware.c
> @@ -363,10 +363,8 @@ void sh_css_unload_firmware(void)
>  		unsigned int i = 0;
> 
>  		for (i = 0; i < sh_css_num_binaries; i++) {
> -			if (fw_minibuffer[i].name)
> -				kfree((void 
*)fw_minibuffer[i].name);
> -			if (fw_minibuffer[i].buffer)
> -				kvfree(fw_minibuffer[i].buffer);
> +			kfree((void *)fw_minibuffer[i].name);
> +			kvfree(fw_minibuffer[i].buffer);
>  		}
>  		kfree(fw_minibuffer);
>  		fw_minibuffer = NULL;