linux-kernel - Re: [PATCH v2 3/3] i2c: xilinx: Use devm

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Date:	Fri, 04 Oct 2013 11:16:20 +0200
From:	Michal Simek <monstr@...str.eu>
To:	Wolfram Sang <wsa@...-dreams.de>
CC:	Michal Simek <michal.simek@...inx.com>,
	linux-kernel@...r.kernel.org,
	Kedareswara rao Appana <appana.durga.rao@...inx.com>,
	Kedareswara rao Appana <appanad@...inx.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Peter Korsgaard <jacmet@...site.dk>, linux-i2c@...r.kernel.org
Subject: Re: [PATCH v2 3/3] i2c: xilinx: Use devm_* functions

On 10/04/2013 07:33 AM, Wolfram Sang wrote:
> 
>> +	i2c->base = devm_ioremap_resource(&pdev->dev, res);
>> +	if (IS_ERR(i2c->base)) {
>> +		dev_err(&pdev->dev, "Could not allocate iomem\n");
> 
> devm_ioremap_resource already prints error messages.

you are right.

> 
>> +	ret = devm_request_irq(&pdev->dev, irq, xiic_isr, 0, pdev->name, i2c);
> 
> This is too early. Can you find out why?

Why do you think that it is too early?
I am looking at origin code again and I think that the code
is also problematic because in xiic_reinit() interrupts are enabled
but they are requested later.
Shouldn't be there a logic that interrupts should be enabled when
interrupts are registered by the kernel?

>> +	pdata = (struct xiic_i2c_platform_data *)dev_get_platdata(&pdev->dev);
> 
> Casting a void pointer?

No problem with that.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform



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