linux-kernel - Re: [PATCH 1/1] net: brcm80211: Deletion of unnecessary checks before two function calls

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Message-ID: <546E2D2A.6090101@broadcom.com>
Date:	Thu, 20 Nov 2014 19:04:26 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
CC:	Brett Rudley <brudley@...adcom.com>,
	"Franky (Zhenhui) Lin" <frankyl@...adcom.com>,
	Hante Meuleman <meuleman@...adcom.com>,
	"John W. Linville" <linville@...driver.com>,
	<linux-wireless@...r.kernel.org>,
	<brcm80211-dev-list@...adcom.com>, <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	<kernel-janitors@...r.kernel.org>,
	"Julia Lawall" <julia.lawall@...6.fr>
Subject: Re: [PATCH 1/1] net: brcm80211: Deletion of unnecessary checks before
 two function calls

On 11/20/14 16:50, SF Markus Elfring wrote:
> From: Markus Elfring<elfring@...rs.sourceforge.net>
> Date: Thu, 20 Nov 2014 16:42:51 +0100
>
> The functions brcmu_pkt_buf_free_skb() and release_firmware() test whether
> their argument is NULL and then return immediately. Thus the test around
> the call is not needed.
>
> This issue was detected by using the Coccinelle software.

Goodo for coccinelle and you for running it.

Acked-by: Arend van Spriel <arend@...adcom.com>
> Signed-off-by: Markus Elfring<elfring@...rs.sourceforge.net>
> ---
>   drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | 3 +--
>   drivers/net/wireless/brcm80211/brcmfmac/firmware.c | 3 +--
>   drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c   | 3 +--
>   drivers/net/wireless/brcm80211/brcmsmac/main.c     | 3 +--
>   4 files changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
> index f55f625..8ff7037 100644
> --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
> +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
> @@ -2539,8 +2539,7 @@ static void brcmf_sdio_bus_stop(struct device *dev)
>   	brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
>
>   	/* Clear any held glomming stuff */
> -	if (bus->glomd)
> -		brcmu_pkt_buf_free_skb(bus->glomd);
> +	brcmu_pkt_buf_free_skb(bus->glomd);
>   	brcmf_sdio_free_glom(bus);
>
>   	/* Clear rx control and wake any waiters */
> diff --git a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
> index 8ea9f28..3a2d014 100644
> --- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
> +++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
> @@ -262,8 +262,7 @@ static void brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx)
>
>   fail:
>   	brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev));
> -	if (fwctx->code)
> -		release_firmware(fwctx->code);
> +	release_firmware(fwctx->code);
>   	device_release_driver(fwctx->dev);
>   	kfree(fwctx);
>   }
> diff --git a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
> index 8f8b937..0cb00dc 100644
> --- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
> +++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
> @@ -506,8 +506,7 @@ static int brcmf_msgbuf_query_dcmd(struct brcmf_pub *drvr, int ifidx,
>   		memcpy(buf, skb->data, (len<  msgbuf->ioctl_resp_ret_len) ?
>   				       len : msgbuf->ioctl_resp_ret_len);
>   	}
> -	if (skb)
> -		brcmu_pkt_buf_free_skb(skb);
> +	brcmu_pkt_buf_free_skb(skb);
>
>   	return msgbuf->ioctl_resp_status;
>   }
> diff --git a/drivers/net/wireless/brcm80211/brcmsmac/main.c b/drivers/net/wireless/brcm80211/brcmsmac/main.c
> index 1b47482..ce538a1 100644
> --- a/drivers/net/wireless/brcm80211/brcmsmac/main.c
> +++ b/drivers/net/wireless/brcm80211/brcmsmac/main.c
> @@ -1009,8 +1009,7 @@ brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
>   		if (txh)
>   			trace_brcms_txdesc(&wlc->hw->d11core->dev, txh,
>   					   sizeof(*txh));
> -		if (p)
> -			brcmu_pkt_buf_free_skb(p);
> +		brcmu_pkt_buf_free_skb(p);
>   	}
>
>   	if (dma&&  queue<  NFIFO) {

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