linux-kernel - Re: [PATCH v2] usb: ehci-s5p: fix: Fix null pointer dereferencing

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Date:	Tue, 23 Apr 2013 02:16:48 +0900
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	Vivek Gautam <gautam.vivek@...sung.com>
CC:	linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
	stern@...land.harvard.edu, kgene.kim@...sung.com,
	Manjunath Goudar <manjunath.goudar@...aro.org>,
	Arnd Bergmann <arnd@...db.de>, Jingoo Han <jg1.han@...sung.com>
Subject: Re: [PATCH v2] usb: ehci-s5p: fix: Fix null pointer dereferencing

On 04/09/13 22:12, Vivek Gautam wrote:
> 7edb3da: (USB: EHCI: make ehci-s5p a separate driver)
> raised an issue with ehci-s5p's driver data.
> Now that 's5p_ehci_hcd' doesn't maintain pointer to 'usb_hcd'
> and s5p_ehci is nothing but a pointer to hcd->priv;
> add hcd to the driver data rather than s5p_ehci.
>
> This fixes issues with null pointer dereferencing in
> s5p_ehci_shutdown(), s5p_ehci_suspend(), s5p_ehci_resume().
>
> Signed-off-by: Vivek Gautam<gautam.vivek@...sung.com>
> CC: Manjunath Goudar<manjunath.goudar@...aro.org>
> CC: Arnd Bergmann<arnd@...db.de>
> CC: Jingoo Han<jg1.han@...sung.com>

Acked-by: Kukjin Kim <kgene.kim@...sung.com>

Thanks.

- Kukjin

> ---
>
> Based on 'usb-next'
>
>   drivers/usb/host/ehci-s5p.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
> index d8cb0ca..580548a 100644
> --- a/drivers/usb/host/ehci-s5p.c
> +++ b/drivers/usb/host/ehci-s5p.c
> @@ -173,7 +173,7 @@ static int s5p_ehci_probe(struct platform_device *pdev)
>   		goto fail_add_hcd;
>   	}
>
> -	platform_set_drvdata(pdev, s5p_ehci);
> +	platform_set_drvdata(pdev, hcd);
>
>   	return 0;
>
--
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