linux-kernel - Re: [PATCH v1 1/5] staging: wfx: fix warnings of no space is necessary

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Date:   Sat, 19 Oct 2019 17:24:43 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jules Irenge <jbi.octave@...il.com>
Cc:     outreachy-kernel@...glegroups.com, devel@...verdev.osuosl.org,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/5] staging: wfx: fix warnings of no space is
 necessary

On Sat, Oct 19, 2019 at 03:07:15PM +0100, Jules Irenge wrote:
> diff --git a/drivers/staging/wfx/bh.c b/drivers/staging/wfx/bh.c
> index 3355183fc86c..573216b08042 100644
> --- a/drivers/staging/wfx/bh.c
> +++ b/drivers/staging/wfx/bh.c
> @@ -69,13 +69,13 @@ static int rx_helper(struct wfx_dev *wdev, size_t read_len, int *is_cnf)
>  	if (wfx_data_read(wdev, skb->data, alloc_len))
>  		goto err;
>  
> -	piggyback = le16_to_cpup((u16 *) (skb->data + alloc_len - 2));
> +	piggyback = le16_to_cpup((u16 *)(skb->data + alloc_len - 2));
>  	_trace_piggyback(piggyback, false);
>  
> -	hif = (struct hif_msg *) skb->data;
> +	hif = (struct hif_msg *)skb->data;
>  	WARN(hif->encrypted & 0x1, "unsupported encryption type");
>  	if (hif->encrypted == 0x2) {
> -		if (wfx_sl_decode(wdev, (void *) hif)) {
> +		if (wfx_sl_decode(wdev, (void *)hif)) {

In the future you may want to go through and remove the (void *) casts.
It's not required here.

> diff --git a/drivers/staging/wfx/bus_spi.c b/drivers/staging/wfx/bus_spi.c
> index f65f7d75e731..effd07957753 100644
> --- a/drivers/staging/wfx/bus_spi.c
> +++ b/drivers/staging/wfx/bus_spi.c
> @@ -90,7 +90,7 @@ static int wfx_spi_copy_to_io(void *priv, unsigned int addr,
>  	struct wfx_spi_priv *bus = priv;
>  	u16 regaddr = (addr << 12) | (count / 2);
>  	// FIXME: use a bounce buffer
> -	u16 *src16 = (void *) src;
> +	u16 *src16 = (void *)src;

Here we are just getting rid of the constness.  Apparently we are doing
that so we can modify it without GCC pointing out the bug!!  I don't
know the code but this seems very wrong.

>  	int ret, i;
>  	struct spi_message      m;
>  	struct spi_transfer     t_addr = {

regards,
dan carpenter