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From: Dan Carpenter <dan.carpenter@oracle.com>
To: zhengbin <zhengbin13@huawei.com>
Cc: devel@driverdev.osuosl.org, eric@anholt.net,
	gregkh@linuxfoundation.org, abbotti@mev.co.uk, wahrenst@gmx.net
Subject: Re: [PATCH 1/6] staging: bcm2835-audio: Remove set but not used variable 'status'
Date: Tue, 8 Oct 2019 09:04:49 +0300	[thread overview]
Message-ID: <20191008060449.GA12948@kadam> (raw)
In-Reply-To: <1570513142-60177-2-git-send-email-zhengbin13@huawei.com>

On Tue, Oct 08, 2019 at 01:38:57PM +0800, zhengbin wrote:
> diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
> index c6f9cf1..8a94c5b 100644
> --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
> +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
> @@ -96,13 +96,12 @@ static void audio_vchi_callback(void *param,
>  	struct bcm2835_audio_instance *instance = param;
>  	struct vc_audio_msg m;
>  	int msg_len;
> -	int status;
> 
>  	if (reason != VCHI_CALLBACK_MSG_AVAILABLE)
>  		return;
> 
> -	status = vchi_msg_dequeue(instance->vchi_handle,
> -				  &m, sizeof(m), &msg_len, VCHI_FLAGS_NONE);
> +	vchi_msg_dequeue(instance->vchi_handle,
> +			 &m, sizeof(m), &msg_len, VCHI_FLAGS_NONE);

This looks like a bug in the code.  flags is VCHI_FLAGS_NONE so it can
return -1 and we should check for that.

>  	if (m.type == VC_AUDIO_MSG_TYPE_RESULT) {

regards,
dan carpenter

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  reply	other threads:[~2019-10-08  6:07 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-08  5:38 [PATCH 0/6] staging: Remove a bounch set of set but not used variables zhengbin
2019-10-08  5:38 ` [PATCH 1/6] staging: bcm2835-audio: Remove set but not used variable 'status' zhengbin
2019-10-08  6:04   ` Dan Carpenter [this message]
2019-10-08  5:38 ` [PATCH 2/6] staging: sm750fb: Remove set but not used variable 'uiActualPixelClk' zhengbin
2019-10-08  6:06   ` Dan Carpenter
2019-10-08  6:08     ` Dan Carpenter
2019-10-08  5:38 ` [PATCH 3/6] staging: sm750fb: Remove set but not used variable 'actual_mx_clk' zhengbin
2019-10-08  5:39 ` [PATCH 4/6] staging: comedi: Remove set but not used variable 'data' zhengbin
2019-10-08  5:39 ` [PATCH 5/6] staging: comedi: Remove set but not used variable 'hi' zhengbin
2019-10-08  5:39 ` [PATCH 6/6] staging: comedi: Remove set but not used variable 'aref' zhengbin

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