On Wed, Sep 18, 2013 at 08:03:44AM -0700, Mike Dunn wrote:
> A NULL pointer dereference exception occurs in the driver probe function when
> device tree is used. The pdata pointer will be NULL in this case, but the
> code
> dereferences it in all cases. When device tree is used, a platform data
> structure is allocated and initialized, and in all cases this pointer is
> copied
> to the driver's private data, so the variable being tested should be accessed
> through the driver's private data structure.
>
> Signed-off-by: Mike Dunn <[email protected]>
Applied, thank you.
> ---
> Changelog:
> v2:
> Initialize pdata for DT case, instead of referencing through keypad struct.
>
> drivers/input/keyboard/pxa27x_keypad.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/input/keyboard/pxa27x_keypad.c
> b/drivers/input/keyboard/pxa27x_keypad.c
> index 134c3b4..d02bdb2 100644
> --- a/drivers/input/keyboard/pxa27x_keypad.c
> +++ b/drivers/input/keyboard/pxa27x_keypad.c
> @@ -788,8 +788,10 @@ static int pxa27x_keypad_probe(struct platform_device
> *pdev)
>
> if (pdata)
> error = pxa27x_keypad_build_keycode(keypad);
> - else
> + else {
> error = pxa27x_keypad_build_keycode_from_dt(keypad);
> + pdata = keypad->pdata;
> + }
> if (error) {
> dev_err(&pdev->dev, "failed to build keycode\n");
> goto failed_put_clk;
> --
> 1.8.1.5
>
--
Dmitry
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