linux-kernel - Re: [PATCH 9/9] staging: ks7010: Delete three unnecessary variable initialisations

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Date:	Sun, 17 Jul 2016 20:51:39 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Wolfram Sang <wsa@...-dreams.de>, devel@...verdev.osuosl.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 9/9] staging: ks7010: Delete three unnecessary variable
 initialisations



On Sun, 17 Jul 2016, SF Markus Elfring wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 17 Jul 2016 19:40:47 +0200
>
> Three variables will be set to an appropriate value a bit later.
> Thus omit the explicit initialisation at the beginning.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/staging/ks7010/ks7010_sdio.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/ks7010/ks7010_sdio.c b/drivers/staging/ks7010/ks7010_sdio.c
> index e06bc3c..3c62c57 100644
> --- a/drivers/staging/ks7010/ks7010_sdio.c
> +++ b/drivers/staging/ks7010/ks7010_sdio.c
> @@ -323,14 +323,14 @@ static void tx_device_task(void *dev)
>  {
>  	struct ks_wlan_private *priv = (struct ks_wlan_private *)dev;
>  	struct tx_device_buffer *sp;
> -	int rc = 0;
>
>  	DPRINTK(4, "\n");
>  	if (cnt_txqbody(priv) > 0
>  	    && atomic_read(&priv->psstatus.status) != PS_SNOOZE) {
>  		sp = &priv->tx_dev.tx_dev_buff[priv->tx_dev.qhead];
>  		if (priv->dev_state >= DEVICE_STATE_BOOT) {
> -			rc = write_to_device(priv, sp->sendp, sp->size);
> +			int rc = write_to_device(priv, sp->sendp, sp->size);

This does not look appealing to me, neither the declaration in the middle
of the function, nor the intiialization to the result of a complex
expression, nor the separation of the call and the error checking code by
a blank line.  There is nothing wrong with having the rc variable be
declared at the the top of the function, in its normal place.

julia

> +
>  			if (rc) {
>  				DPRINTK(1, "write_to_device error !!(%d)\n",
>  					rc);
> @@ -358,7 +358,7 @@ int ks_wlan_hw_tx(struct ks_wlan_private *priv, void *p, unsigned long size,
>  		  void (*complete_handler) (void *arg1, void *arg2),
>  		  void *arg1, void *arg2)
>  {
> -	int result = 0;
> +	int result;
>  	struct hostif_hdr *hdr;
>  	hdr = (struct hostif_hdr *)p;
>
> @@ -737,7 +737,7 @@ free_buf:
>  static int ks7010_upload_firmware(struct ks_wlan_private *priv,
>  				  struct ks_sdio_card *card)
>  {
> -	unsigned int size, offset, n = 0;
> +	unsigned int size, offset, n;
>  	unsigned char *rom_buf;
>  	unsigned char rw_data = 0;
>  	int retval, rc = 0;
> --
> 2.9.1
>
> --
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