linux-kernel - Re: [PATCH] staging: vc04_services: Delete unnecessary NULL check

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Message-ID: <9cd4919c-657e-4533-8f11-521d31e60123@ideasonboard.com>
Date: Thu, 25 Apr 2024 12:07:47 +0530
From: Umang Jain <umang.jain@...asonboard.com>
To: Dan Carpenter <dan.carpenter@...aro.org>,
 Florian Fainelli <florian.fainelli@...adcom.com>
Cc: Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Stefan Wahren <wahrenst@....net>, linux-rpi-kernel@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev,
 linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] staging: vc04_services: Delete unnecessary NULL check

HI Dan,

Thank you for the patch

On 24/04/24 5:13 pm, Dan Carpenter wrote:
> The "state" pointer points to an offset in the middle of the "mgmt"
> struct so it can't possibly be NULL.  And also we dereferenced it on the
> line before.  So this NULL check is pointless.  Delete it.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>

Reviewed-by: Umang Jain <umang.jain@...asonboard.com>
> ---
>   .../staging/vc04_services/interface/vchiq_arm/vchiq_dev.c    | 5 -----
>   1 file changed, 5 deletions(-)
>
> diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
> index 9fe35864936c..3c63347d2d08 100644
> --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
> +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
> @@ -1170,11 +1170,6 @@ static int vchiq_open(struct inode *inode, struct file *file)
>   
>   	dev_dbg(state->dev, "arm: vchiq open\n");
>   
> -	if (!state) {
> -		dev_err(state->dev, "arm: vchiq has no connection to VideoCore\n");
> -		return -ENOTCONN;
> -	}
> -
>   	instance = kzalloc(sizeof(*instance), GFP_KERNEL);
>   	if (!instance)
>   		return -ENOMEM;