linux-kernel - Re: [PATCH v6 2/2] mtd: rawnand: Add NAND controller support on Intel LGM SoC

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Date:   Thu, 14 May 2020 09:04:14 +0800
From:   "Ramuthevar, Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        devicetree@...r.kernel.org, miquel.raynal@...tlin.com,
        richard@....at, vigneshr@...com, arnd@...db.de,
        brendanhiggins@...gle.com, tglx@...utronix.de,
        boris.brezillon@...labora.com, anders.roxell@...aro.org,
        masonccyang@...c.com.tw, robh+dt@...nel.org,
        linux-mips@...r.kernel.org, hauke.mehrtens@...el.com,
        qi-ming.wu@...el.com, cheol.yong.kim@...el.com
Subject: Re: [PATCH v6 2/2] mtd: rawnand: Add NAND controller support on Intel
 LGM SoC

Hi Andy,

On 13/5/2020 11:35 pm, Andy Shevchenko wrote:
> On Wed, May 13, 2020 at 06:34:05PM +0300, Andy Shevchenko wrote:
>> On Wed, May 13, 2020 at 06:46:15PM +0800, Ramuthevar,Vadivel MuruganX wrote:
> 
> ...
> 
>>> +static int ebu_nand_remove(struct platform_device *pdev)
>>> +{
>>> +	struct ebu_nand_controller *ebu_host = platform_get_drvdata(pdev);
>>> +
>>
>>> +	if (ebu_host) {
>>
>> How it can be NULL here?
>>
>>> +		mtd_device_unregister(nand_to_mtd(&ebu_host->chip));
>>> +		nand_cleanup(&ebu_host->chip);
>>> +		ebu_nand_disable(&ebu_host->chip);
>>> +
> 
>>> +		if (ebu_host->dma_rx || ebu_host->dma_tx)
> 
> This is duplicate and thus redundant.
Let me check and update, Thanks!

Regards
Vadivel
> 
>>> +			ebu_dma_cleanup(ebu_host);
>>> +
>>> +		clk_disable_unprepare(ebu_host->clk);
>>> +	}
>>> +
>>> +	return 0;
>>> +}
>