Date: Wed, 18 Nov 2015 11:38:17 +0800
From: Peter Chen <peter.chen@freescale.com>
To: Saurabh Sengar <saurabh.truth@gmail.com>
CC: <mans@mansr.com>, <gregkh@linuxfoundation.org>,
        <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3] usb: chipidea: removing of_find_property
Message-ID: <20151118033816.GB4228@shlinux2>
References: <yw1xy4dwhmu7.fsf@unicorn.mansr.com>
 <1447761146-4599-1-git-send-email-saurabh.truth@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <1447761146-4599-1-git-send-email-saurabh.truth@gmail.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
SpamDiagnosticOutput: 1:5
SpamDiagnosticMetadata: 00000000%2D0000%2D0000%2D0000%2D000000000000
SpamDiagnosticMetadata: 1
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Nov 2015 03:40:58.9564
 (UTC)
X-MS-Exchange-CrossTenant-Id: 710a03f5-10f6-4d38-9ff4-a80b81da590d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=710a03f5-10f6-4d38-9ff4-a80b81da590d;Ip=[192.88.168.50];Helo=[tx30smr01.am.freescale.net]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM2PR03MB557
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 3793
Lines: 115

On Tue, Nov 17, 2015 at 05:22:26PM +0530, Saurabh Sengar wrote:
> call to of_find_property() before of_property_read_u32() is unnecessary.
> of_property_read_u32() anyway calls to of_find_property() only.
> 
> Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com>
> ---
> v2 : removed pval variable
> v3 : removed unnecessary if condition
>  drivers/usb/chipidea/core.c | 59 +++++++++++++++++++--------------------------
>  1 file changed, 25 insertions(+), 34 deletions(-)
> 
> diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> index 965d0e2..960a925 100644
> --- a/drivers/usb/chipidea/core.c
> +++ b/drivers/usb/chipidea/core.c
> @@ -688,52 +688,43 @@ static int ci_get_platdata(struct device *dev,
>  	if (usb_get_maximum_speed(dev) == USB_SPEED_FULL)
>  		platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
>  
> -	if (of_find_property(dev->of_node, "phy-clkgate-delay-us", NULL))
> -		of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
> +	of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
>  				     &platdata->phy_clkgate_delay_us);
>  
>  	platdata->itc_setting = 1;
> -	if (of_find_property(dev->of_node, "itc-setting", NULL)) {
> -		ret = of_property_read_u32(dev->of_node, "itc-setting",
> -			&platdata->itc_setting);
> -		if (ret) {
> -			dev_err(dev,
> -				"failed to get itc-setting\n");
> -			return ret;
> -		}
> +
> +	ret = of_property_read_u32(dev->of_node, "itc-setting",
> +					&platdata->itc_setting);
> +	if (ret && ret != -EINVAL) {
> +		dev_err(dev, "failed to get itc-setting\n");
> +		return ret;
>  	}

For this one, you may not need to check return value, since
platdata->itc_setting is optional, and doesn't need to set
any flags if platdata->itc_setting is valid.

Other changes are ok for me.

Peter

>  
> -	if (of_find_property(dev->of_node, "ahb-burst-config", NULL)) {
> -		ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
> -			&platdata->ahb_burst_config);
> -		if (ret) {
> -			dev_err(dev,
> -				"failed to get ahb-burst-config\n");
> -			return ret;
> -		}
> +	ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
> +				&platdata->ahb_burst_config);
> +	if (!ret) {
>  		platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST;
> +	} else if (ret != -EINVAL) {
> +		dev_err(dev, "failed to get ahb-burst-config\n");
> +		return ret;
>  	}
>  
> -	if (of_find_property(dev->of_node, "tx-burst-size-dword", NULL)) {
> -		ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword",
> -			&platdata->tx_burst_size);
> -		if (ret) {
> -			dev_err(dev,
> -				"failed to get tx-burst-size-dword\n");
> -			return ret;
> -		}
> +	ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword",
> +				&platdata->tx_burst_size);
> +	if (!ret) {
>  		platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST;
> +	} else if (ret != -EINVAL) {
> +		dev_err(dev, "failed to get tx-burst-size-dword\n");
> +		return ret;
>  	}
>  
> -	if (of_find_property(dev->of_node, "rx-burst-size-dword", NULL)) {
> -		ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword",
> -			&platdata->rx_burst_size);
> -		if (ret) {
> -			dev_err(dev,
> -				"failed to get rx-burst-size-dword\n");
> -			return ret;
> -		}
> +	ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword",
> +				&platdata->rx_burst_size);
> +	if (!ret) {
>  		platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST;
> +	} else if (ret != -EINVAL) {
> +		dev_err(dev, "failed to get rx-burst-size-dword\n");
> +		return ret;
>  	}
>  
>  	ext_id = ERR_PTR(-ENODEV);
> -- 
> 1.9.1
> 

-- 

Best Regards,
Peter Chen
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/