linux-kernel - Re: [PATCH][next] usb: dwc3: gadget: Remove redundant assignment to pointer trb

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Date: Thu, 8 Feb 2024 23:56:09 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Colin Ian King <colin.i.king@...il.com>
CC: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][next] usb: dwc3: gadget: Remove redundant assignment to
 pointer trb

On Wed, Feb 07, 2024, Colin Ian King wrote:
> The pointer trb is being assigned a value that is not being
> read afterwards, it is being re-assigned later inside a for_each_sg
> loop. The assignment is redundant and can be removed.
> 
> Cleans up clang scan warning:
> drivers/usb/dwc3/gadget.c:3432:19: warning: Value stored to 'trb'
> during its initialization is never read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>
> ---
>  drivers/usb/dwc3/gadget.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 564976b3e2b9..6e47259f2c4f 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -3429,7 +3429,7 @@ static int dwc3_gadget_ep_reclaim_trb_sg(struct dwc3_ep *dep,
>  		struct dwc3_request *req, const struct dwc3_event_depevt *event,
>  		int status)
>  {
> -	struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];
> +	struct dwc3_trb *trb;
>  	struct scatterlist *sg = req->sg;
>  	struct scatterlist *s;
>  	unsigned int num_queued = req->num_queued_sgs;
> -- 
> 2.39.2
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>

Thinh