linux-kernel - Re: [PATCH 13/30] net: Don't do pointless kmalloc return value casts in zd1211 driver

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Date:	Thu, 30 Aug 2007 13:54:47 -0400
From:	Daniel Drake <dsd@...too.org>
To:	Jesper Juhl <jesper.juhl@...il.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Ulrich Kunitz <kune@...ne-taler.de>,
	linux-wireless@...r.kernel.org
Subject: Re: [PATCH 13/30] net: Don't do pointless kmalloc return value casts
 in zd1211 driver

Jesper Juhl wrote:
> Since kmalloc() returns a void pointer there is no reason to cast
> its return value.
> This patch also removes a pointless initialization of a variable.

NAK: adds a sparse warning
zd_chip.c:116:15: warning: implicit cast to nocast type

> Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>
> ---
>  drivers/net/wireless/zd1211rw/zd_chip.c |    5 ++---
>  1 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/wireless/zd1211rw/zd_chip.c b/drivers/net/wireless/zd1211rw/zd_chip.c
> index c39f198..4942e5c 100644
> --- a/drivers/net/wireless/zd1211rw/zd_chip.c
> +++ b/drivers/net/wireless/zd1211rw/zd_chip.c
> @@ -106,8 +106,8 @@ int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr
>  {
>  	int r;
>  	int i;
> -	zd_addr_t *a16 = (zd_addr_t *)NULL;
>  	u16 *v16;
> +	zd_addr_t *a16;
>  	unsigned int count16;
>  
>  	if (count > USB_MAX_IOREAD32_COUNT)
> @@ -115,8 +115,7 @@ int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr
>  
>  	/* Allocate a single memory block for values and addresses. */
>  	count16 = 2*count;
> -	a16 = (zd_addr_t *) kmalloc(count16 * (sizeof(zd_addr_t) + sizeof(u16)),
> -		                   GFP_KERNEL);
> +	a16 = kmalloc(count16 * (sizeof(zd_addr_t) + sizeof(u16)), GFP_KERNEL);
>  	if (!a16) {
>  		dev_dbg_f(zd_chip_dev(chip),
>  			  "error ENOMEM in allocation of a16\n");

-
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