Re: [PATCH 1/1] usb: host: ehci-spear: Fix potential NULL pointer dereferencing

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On 22 May 2013 09:05, Sachin Kamat <sachin.kamat@xxxxxxxxxx> wrote:
> 'hcd' is dereferenced before NULL check. Move the assignment after
> the check to avoid potential NULL pointer dereferencing error.
>
> Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
> Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> ---
>  drivers/usb/host/ehci-spear.c |    5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
> index f5ac4e2..326bfea 100644
> --- a/drivers/usb/host/ehci-spear.c
> +++ b/drivers/usb/host/ehci-spear.c
> @@ -146,10 +146,13 @@ fail:
>  static int spear_ehci_hcd_drv_remove(struct platform_device *pdev)
>  {
>         struct usb_hcd *hcd = platform_get_drvdata(pdev);
> -       struct spear_ehci *sehci = to_spear_ehci(hcd);
> +       struct spear_ehci *sehci;
>
>         if (!hcd)
>                 return 0;
> +
> +       sehci = to_spear_ehci(hcd);
> +
>         if (in_interrupt())
>                 BUG();
>         usb_remove_hcd(hcd);

Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
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