linux-kernel - Re: [PATCH V2 3/4] [SCSI] ufs: Add Platform glue driver for ufshcd

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Date:	Thu, 19 Jul 2012 21:16:32 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	vinayak holikatti <vinholikatti@...il.com>
Cc:	James.Bottomley@...senpartnership.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, patches@...aro.org,
	linux-samsung-soc@...r.kernel.org, santoshsy@...il.com,
	arnd@...aro.org, girish.shivananjappa@...aro.org,
	saugata.das@...aro.org, vishak.g@...sung.com, venkat@...aro.org,
	k.rajesh@...sung.com, dsaxena@...aro.org, ilho215.lee@...sung.com,
	nala.la@...sung.com, sreekumar.c@...sung.com
Subject: Re: [PATCH V2 3/4] [SCSI] ufs: Add Platform glue driver for ufshcd

2012/7/17 vinayak holikatti <vinholikatti@...il.com>:
> On Mon, Jul 16, 2012 at 7:19 PM, Namjae Jeon <linkinjeon@...il.com> wrote:
>> Hi Vinayak.
>>> + * ufshcd_pltfrm_remove - remove platform driver routine
>>> + * @pdev: pointer to platform device handle
>>> + *
>>> + * Returns 0 on success, non-zero value on failure
>>> + */
>>> +static int __devexit ufshcd_pltfrm_remove(struct platform_device *pdev)
>>> +{
>>> +     struct resource *mem_res;
>>> +     struct resource *irq_res;
>>> +     resource_size_t mem_size;
>>> +     struct ufs_hba *hba =  platform_get_drvdata(pdev);
>>> +
>>> +     ufshcd_remove(hba);
>>> +     irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>>> +     if (!irq_res)
>>> +             dev_err(&pdev->dev, "ufshcd: IRQ resource not available\n");
>>> +     free_irq(irq_res->start, hba);
>> Is there no possibility of null pointer dereferencing error ?(irq_res->start)
>> I think that free_irq should be not called if irq_res is NULL.
> I agree, I have overlooked at this logic, the free_irq should have
> been in the else
> part of this section. I will make the modification in the next version
> of patches.
Okay.
You can add my
Reviewed-by: Namjae Jeon <linkinjeon@...il.com>
in these patchset

Thanks.
>>> +     mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> Looks mem_res is also same with upper case.
>> Thanks.
>>> +     mem_size = resource_size(mem_res);
>>> +     release_mem_region(mem_res->start, mem_size);
>>> +     platform_set_drvdata(pdev, NULL);
>>> +     return 0;
>>> +}
>>> +
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