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

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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@xxxxxxxxxx>

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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