linux-kernel - RE: [PATCH] Add Silicom Platform Driver

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Date:   Tue, 8 Aug 2023 19:19:43 +0000
From:   Huibin Shi <henrys@...icom-usa.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Henry Shi <henryshi2018@...il.com>,
        "hbshi69@...mail.com" <hbshi69@...mail.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>,
        "markgross@...nel.org" <markgross@...nel.org>,
        "jdelvare@...e.com" <jdelvare@...e.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>
CC:     "hb_shi2003@...oo.com" <hb_shi2003@...oo.com>,
        Wen Wang <wenw@...icom-usa.com>
Subject: RE: [PATCH] Add Silicom Platform Driver

Guenter,

Here is the implementation of  devm_kmemdup(), *src is the extra argument

void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
{
	void *p;

	p = devm_kmalloc(dev, len, gfp);
	if (p)
		memcpy(p, src, len);

	return p;
}

Henry
-----Original Message-----
From: Guenter Roeck <groeck7@...il.com> On Behalf Of Guenter Roeck
Sent: Friday, July 28, 2023 10:29 AM
To: Huibin Shi <henrys@...icom-usa.com>; Christophe JAILLET <christophe.jaillet@...adoo.fr>; Henry Shi <henryshi2018@...il.com>; hbshi69@...mail.com; tglx@...utronix.de; mingo@...hat.com; bp@...en8.de; dave.hansen@...ux.intel.com; x86@...nel.org; hpa@...or.com; hdegoede@...hat.com; markgross@...nel.org; jdelvare@...e.com; linux-kernel@...r.kernel.org; platform-driver-x86@...r.kernel.org; linux-hwmon@...r.kernel.org
Cc: hb_shi2003@...oo.com; Wen Wang <wenw@...icom-usa.com>
Subject: Re: [PATCH] Add Silicom Platform Driver

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On 7/28/23 05:59, Huibin Shi wrote:
> Christophe,
>
> Thanks for the comments. See my comments below.
>
> Updated patch will be sent out later after review comments from other reviewers are addressed.
>
> Henry
> -----Original Message-----
> From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> Sent: Tuesday, July 25, 2023 5:03 PM
> To: Henry Shi <henryshi2018@...il.com>; hbshi69@...mail.com; 
> tglx@...utronix.de; mingo@...hat.com; bp@...en8.de; 
> dave.hansen@...ux.intel.com; x86@...nel.org; hpa@...or.com; 
> hdegoede@...hat.com; markgross@...nel.org; jdelvare@...e.com; 
> linux@...ck-us.net; linux-kernel@...r.kernel.org; 
> platform-driver-x86@...r.kernel.org; linux-hwmon@...r.kernel.org
> Cc: hb_shi2003@...oo.com; Huibin Shi <henrys@...icom-usa.com>; Wen 
> Wang <wenw@...icom-usa.com>
> Subject: Re: [PATCH] Add Silicom Platform Driver
>
> Caution: This is an external email. Please take care when clicking links or opening attachments.
>
>
> Le 18/07/2023 à 18:01, Henry Shi a écrit :
>> The Silicom platform (silicom-platform) Linux driver for Swisscom 
>> Business Box (Swisscom BB) as well as Cordoba family products is a 
>> software solution designed to facilitate the efficient management and 
>> control of devices through the integration of various Linux 
>> frameworks. This platform driver provides seamless support for device 
>> management via the Linux LED framework, GPIO framework, Hardware 
>> Monitoring (HWMON), and device attributes. The Silicom platform 
>> driver's compatibility with these Linux frameworks allows 
>> applications to access and control Cordoba family devices using 
>> existing software that is compatible with these frameworks. This 
>> compatibility simplifies the development process, reduces 
>> dependencies on proprietary solutions, and promotes interoperability 
>> with other Linux-based systems and software.
>>
>> Signed-off-by: Henry Shi <henryshi2018@...il.com>
>> ---
>
> [...]
>
>> +static int __init silicom_mc_leds_register(struct device *dev,
>> +                                        const struct led_classdev_mc
>> +*mc_leds) {
>> +     struct led_classdev_mc *led;
>> +     int i, err;
>> +
>> +     for (i = 0; mc_leds[i].led_cdev.name; i++) {
>> +             /* allocate and copy data from the init constansts */
>> +             led = devm_kzalloc(dev, sizeof(struct led_classdev_mc), 
>> + GFP_KERNEL);
>
> sizeof(*led) is shorter.
> Mostly a matter of taste.
>
> Maybe even devm_kmemdup()?
>
> Henry: thanks. Devm_kmemdup() API requires additional argument that is not necessary of this driver. I prefer devm_kzalloc for now.
>

I am curious: What would that additional argument be ?

Guenter