Subject: Re: [PATCH] NFC: microread: Pass err variable to async_cb()

From: Dan Carpenter <[email-masked]>
Date: Tue, 1 Jun 2021 16:37:57 +0300

On Tue, Jun 01, 2021 at 09:00:33AM -0400, Nigel Christian wrote:
> In the case MICROREAD_CB_TYPE_READER_ALL clang reports a dead
> code warning. The error code is being directly passed to 
> async_cb(). Fix this by passing the err variable, which is also
> done in another path.
> 
> Addresses-Coverity: ("Unused value") 
> Signed-off-by: Nigel Christian <[email-masked]>
> ---
>  drivers/nfc/microread/microread.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/nfc/microread/microread.c b/drivers/nfc/microread/microread.c
> index 8d3988457c58..130b0f554016 100644
> --- a/drivers/nfc/microread/microread.c
> +++ b/drivers/nfc/microread/microread.c
> @@ -367,7 +367,7 @@ static void microread_im_transceive_cb(void *context, struct sk_buff *skb,
>  				err = -EPROTO;
>  				kfree_skb(skb);
>  				info->async_cb(info->async_cb_context, NULL,
> -					       -EPROTO);
> +					       err);

It would be better to just delete the "err = -EPROTO;" assignment.

Literals are more readable.  Avoid pointless indirection.

regards,
dan carpenter