RE: [kbuild-all] Re: drivers/input/touchscreen/elants_i2c.c:859:45: warning: Clarify calculation precedence for '&' and

2020-08-10 Thread Xia, Hui 



>-Original Message-
>From: Dmitry Torokhov 
>Sent: 2020年8月7日 6:31
>To: lkp 
>Cc: Johnny Chuang ; kbuild-...@lists.01.org; linux-
>ker...@vger.kernel.org; Peter Hutterer 
>Subject: [kbuild-all] Re: drivers/input/touchscreen/elants_i2c.c:859:45: 
>warning:
>Clarify calculation precedence for '&' and
>
>On Sun, Aug 02, 2020 at 06:18:19AM +0800, kernel test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
>> master
>> head:   d52daa8620c65960e1ef882adc1f92061326bd7a
>> commit: f27ad8932725f8dd0cd1a46763de4a40377b1ae6 Input: elants_i2c -
>support palm detection
>> date:   4 months ago
>> compiler: xtensa-linux-gcc (GCC) 9.3.0
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot 
>>
>>
>> cppcheck warnings: (new ones prefixed by >>)
>>
>> >> drivers/input/touchscreen/elants_i2c.c:859:45: warning: Clarify
>> >> calculation precedence for '&' and '?'. [clarifyCalculation]
>> tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ?
>>^
>
>No, there is no need to clarify precedence as it is already clear.

Thanks Dmitry. We will ignore this warning type. Sorry for the noise.

--Hui

>
>Thanks.
>
>--
>Dmitry
>___
>kbuild-all mailing list -- kbuild-...@lists.01.org To unsubscribe send an 
>email to
>kbuild-all-le...@lists.01.org

Re: drivers/input/touchscreen/elants_i2c.c:859:45: warning: Clarify calculation precedence for '&' and

2020-08-06 Thread Dmitry Torokhov 
On Sun, Aug 02, 2020 at 06:18:19AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
> master
> head:   d52daa8620c65960e1ef882adc1f92061326bd7a
> commit: f27ad8932725f8dd0cd1a46763de4a40377b1ae6 Input: elants_i2c - support 
> palm detection
> date:   4 months ago
> compiler: xtensa-linux-gcc (GCC) 9.3.0
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot 
> 
> 
> cppcheck warnings: (new ones prefixed by >>)
> 
> >> drivers/input/touchscreen/elants_i2c.c:859:45: warning: Clarify 
> >> calculation precedence for '&' and '?'. [clarifyCalculation]
> tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ?
>^

No, there is no need to clarify precedence as it is already clear.

Thanks.

-- 
Dmitry

drivers/input/touchscreen/elants_i2c.c:859:45: warning: Clarify calculation precedence for '&' and

2020-08-01 Thread kernel test robot 
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   d52daa8620c65960e1ef882adc1f92061326bd7a
commit: f27ad8932725f8dd0cd1a46763de4a40377b1ae6 Input: elants_i2c - support 
palm detection
date:   4 months ago
compiler: xtensa-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot 


cppcheck warnings: (new ones prefixed by >>)

>> drivers/input/touchscreen/elants_i2c.c:859:45: warning: Clarify calculation 
>> precedence for '&' and '?'. [clarifyCalculation]
tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ?
   ^

vim +859 drivers/input/touchscreen/elants_i2c.c

   838  
   839  /*
   840   * Event reporting.
   841   */
   842  
   843  static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf)
   844  {
   845  struct input_dev *input = ts->input;
   846  unsigned int n_fingers;
   847  unsigned int tool_type;
   848  u16 finger_state;
   849  int i;
   850  
   851  n_fingers = buf[FW_POS_STATE + 1] & 0x0f;
   852  finger_state = ((buf[FW_POS_STATE + 1] & 0x30) << 4) |
   853  buf[FW_POS_STATE];
   854  
   855  dev_dbg(>client->dev,
   856  "n_fingers: %u, state: %04x\n",  n_fingers, 
finger_state);
   857  
   858  /* Note: all fingers have the same tool type */
 > 859  tool_type = buf[FW_POS_TOOL_TYPE] & BIT(0) ?
   860  MT_TOOL_FINGER : MT_TOOL_PALM;
   861  
   862  for (i = 0; i < MAX_CONTACT_NUM && n_fingers; i++) {
   863  if (finger_state & 1) {
   864  unsigned int x, y, p, w;
   865  u8 *pos;
   866  
   867  pos = [FW_POS_XY + i * 3];
   868  x = (((u16)pos[0] & 0xf0) << 4) | pos[1];
   869  y = (((u16)pos[0] & 0x0f) << 8) | pos[2];
   870  p = buf[FW_POS_PRESSURE + i];
   871  w = buf[FW_POS_WIDTH + i];
   872  
   873  dev_dbg(>client->dev, "i=%d x=%d y=%d p=%d 
w=%d\n",
   874  i, x, y, p, w);
   875  
   876  input_mt_slot(input, i);
   877  input_mt_report_slot_state(input, tool_type, 
true);
   878  input_event(input, EV_ABS, ABS_MT_POSITION_X, 
x);
   879  input_event(input, EV_ABS, ABS_MT_POSITION_Y, 
y);
   880  input_event(input, EV_ABS, ABS_MT_PRESSURE, p);
   881  input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, 
w);
   882  
   883  n_fingers--;
   884  }
   885  
   886  finger_state >>= 1;
   887  }
   888  
   889  input_mt_sync_frame(input);
   890  input_sync(input);
   891  }
   892  

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