* [patch 2/3] Input: cyttsp4 - silence NULL dereference warning
@ 2013-07-02 21:41 Dan Carpenter
2013-07-03 12:33 ` Ferruh Yigit
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2013-07-02 21:41 UTC (permalink / raw)
To: Javier Martinez Canillas, Ferruh Yigit
Cc: Dmitry Torokhov, linux-input, kernel-janitors
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) {
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [patch 2/3] Input: cyttsp4 - silence NULL dereference warning
2013-07-02 21:41 [patch 2/3] Input: cyttsp4 - silence NULL dereference warning Dan Carpenter
@ 2013-07-03 12:33 ` Ferruh Yigit
0 siblings, 0 replies; 2+ messages in thread
From: Ferruh Yigit @ 2013-07-03 12:33 UTC (permalink / raw)
To: Dan Carpenter
Cc: Javier Martinez Canillas, Dmitry Torokhov, linux-input,
kernel-janitors
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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