Re: [patch 2/3] Input: cyttsp4 - silence NULL dereference warning

[Ferruh Yigit <fery@cypress.com>]

On 07/03/2013 12:41 AM, Dan Carpenter wrote:
> If "cd" were NULL then we would dereference it when we print the error
> message.  Fortunately enough, it can't ever be NULL so we can remove
> those lines.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
> index 7aa4a34..851e3ff 100644
> --- a/drivers/input/touchscreen/cyttsp4_core.c
> +++ b/drivers/input/touchscreen/cyttsp4_core.c
> @@ -1450,11 +1450,6 @@ static void cyttsp4_watchdog_work(struct work_struct *work)
>       u8 *mode;
>       int retval;
>
> -     if (cd == NULL) {
> -             dev_err(cd->dev, "%s: NULL context pointer\n", __func__);
> -             return;
> -     }
> -
>       mutex_lock(&cd->system_lock);
>       retval = cyttsp4_load_status_regs(cd);
>       if (retval < 0) {
You are right, cd dereference is wrong in error message.
And agree on removing block, cd will not be NULL in this context.

--

Thanks,
ferruh

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