linux-kernel - Re: [PATCH v3] rtc: ds1307: generalise ram size and offset

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Message-ID: <20120119194541.GA32483@pengutronix.de>
Date:	Thu, 19 Jan 2012 20:45:41 +0100
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	Austin Boyle <Austin.Boyle@...atnet.com>
Cc:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] rtc: ds1307: generalise ram size and offset


Sorry, found another thing.

> +	if (chip) {
> +		if (chip->nvram_size)
> +			ds1307->nvram_size = chip->nvram_size;
> +		if (chip->nvram_offset)
> +			ds1307->nvram_offset = chip->nvram_offset;
> +	}

I moved only the assignments...

>  
>  	buf = ds1307->regs;
>  	if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
> @@ -893,11 +907,12 @@ read_rtc:
>  		dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
>  	}
>  
> -	if (chip && chip->nvram56) {
> +	if (chip && chip->nvram_size) {

.. to here when I saw...

> +		nvram.size = ds1307->nvram_size;

... that nvram is static and we are changing it. Yeah, it is very unlikely but
if we have two RTC with different nvram sizes, one of them will not work correctly.

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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