linux-kernel - Re: [PATCH v5 03/14] efi/apple-properties: use PROPERTY_ENTRY_U8_ARRAY

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Message-ID: <20191015120149.GD32742@smile.fi.intel.com>
Date:   Tue, 15 Oct 2019 15:01:49 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v5 03/14] efi/apple-properties: use
 PROPERTY_ENTRY_U8_ARRAY_LEN

On Fri, Oct 11, 2019 at 04:07:10PM -0700, Dmitry Torokhov wrote:
> Let's switch to using PROPERTY_ENTRY_U8_ARRAY_LEN() to initialize
> property entries. Also, when dumping data, rely on local variables
> instead of poking into the property entry structure directly.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>  drivers/firmware/efi/apple-properties.c | 18 ++++++++----------
>  1 file changed, 8 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/firmware/efi/apple-properties.c b/drivers/firmware/efi/apple-properties.c
> index 0e206c9e0d7a..5ccf39986a14 100644
> --- a/drivers/firmware/efi/apple-properties.c
> +++ b/drivers/firmware/efi/apple-properties.c
> @@ -53,7 +53,8 @@ static void __init unmarshal_key_value_pairs(struct dev_header *dev_header,
>  
>  	for (i = 0; i < dev_header->prop_count; i++) {
>  		int remaining = dev_header->len - (ptr - (void *)dev_header);
> -		u32 key_len, val_len;
> +		u32 key_len, val_len, entry_len;
> +		const u8 *entry_data;
>  		char *key;
>  
>  		if (sizeof(key_len) > remaining)
> @@ -85,17 +86,14 @@ static void __init unmarshal_key_value_pairs(struct dev_header *dev_header,
>  		ucs2_as_utf8(key, ptr + sizeof(key_len),
>  			     key_len - sizeof(key_len));
>  
> -		entry[i].name = key;
> -		entry[i].length = val_len - sizeof(val_len);
> -		entry[i].is_array = !!entry[i].length;
> -		entry[i].type = DEV_PROP_U8;
> -		entry[i].pointer.u8_data = ptr + key_len + sizeof(val_len);
> -
> +		entry_data = ptr + key_len + sizeof(val_len);
> +		entry_len = val_len - sizeof(val_len);
> +		entry[i] = PROPERTY_ENTRY_U8_ARRAY_LEN(key, entry_data,
> +						       entry_len);

I would rather leave on one line.
Nevertheless,

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

>  		if (dump_properties) {
> -			dev_info(dev, "property: %s\n", entry[i].name);
> +			dev_info(dev, "property: %s\n", key);
>  			print_hex_dump(KERN_INFO, pr_fmt(), DUMP_PREFIX_OFFSET,
> -				16, 1, entry[i].pointer.u8_data,
> -				entry[i].length, true);
> +				16, 1, entry_data, entry_len, true);
>  		}
>  
>  		ptr += key_len + val_len;
> -- 
> 2.23.0.700.g56cf767bdb-goog
> 

-- 
With Best Regards,
Andy Shevchenko