Re: [PATCH 4/4] iio: imu: add BNO055 serdev driver

[kernel test robot <lkp@intel.com>]

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Hi Andrea,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on iio/togreg]
[also build test WARNING on robh/for-next linus/master v5.14-rc1 next-20210715]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20210715-222018
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 10.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/616d1b9a99ec2045cdf6cc827751660a48ccc5d2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20210715-222018
        git checkout 616d1b9a99ec2045cdf6cc827751660a48ccc5d2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from include/linux/device.h:15,
                    from drivers/iio/imu/bno055/bno055_sl.c:18:
   drivers/iio/imu/bno055/bno055_sl.c: In function 'bno055_sl_write_reg':
>> drivers/iio/imu/bno055/bno055_sl.c:286:31: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long unsigned int'} [-Wformat=]
     286 |   dev_err(&priv->serdev->dev, "Invalid write count %d", count);
         |                               ^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:19:22: note: in definition of macro 'dev_fmt'
      19 | #define dev_fmt(fmt) fmt
         |                      ^~~
   drivers/iio/imu/bno055/bno055_sl.c:286:3: note: in expansion of macro 'dev_err'
     286 |   dev_err(&priv->serdev->dev, "Invalid write count %d", count);
         |   ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:286:53: note: format string is defined here
     286 |   dev_err(&priv->serdev->dev, "Invalid write count %d", count);
         |                                                    ~^
         |                                                     |
         |                                                     int
         |                                                    %ld
   In file included from include/linux/device.h:15,
                    from drivers/iio/imu/bno055/bno055_sl.c:18:
   drivers/iio/imu/bno055/bno055_sl.c: In function 'bno055_sl_read_reg':
   drivers/iio/imu/bno055/bno055_sl.c:306:31: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long unsigned int'} [-Wformat=]
     306 |   dev_err(&priv->serdev->dev, "Invalid read regsize %d",
         |                               ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:19:22: note: in definition of macro 'dev_fmt'
      19 | #define dev_fmt(fmt) fmt
         |                      ^~~
   drivers/iio/imu/bno055/bno055_sl.c:306:3: note: in expansion of macro 'dev_err'
     306 |   dev_err(&priv->serdev->dev, "Invalid read regsize %d",
         |   ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:306:54: note: format string is defined here
     306 |   dev_err(&priv->serdev->dev, "Invalid read regsize %d",
         |                                                     ~^
         |                                                      |
         |                                                      int
         |                                                     %ld
   In file included from include/linux/device.h:15,
                    from drivers/iio/imu/bno055/bno055_sl.c:18:
   drivers/iio/imu/bno055/bno055_sl.c:312:31: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long unsigned int'} [-Wformat=]
     312 |   dev_err(&priv->serdev->dev, "Invalid read valsize %d",
         |                               ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:19:22: note: in definition of macro 'dev_fmt'
      19 | #define dev_fmt(fmt) fmt
         |                      ^~~
   drivers/iio/imu/bno055/bno055_sl.c:312:3: note: in expansion of macro 'dev_err'
     312 |   dev_err(&priv->serdev->dev, "Invalid read valsize %d",
         |   ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:312:54: note: format string is defined here
     312 |   dev_err(&priv->serdev->dev, "Invalid read valsize %d",
         |                                                     ~^
         |                                                      |
         |                                                      int
         |                                                     %ld
   In file included from include/linux/printk.h:456,
                    from include/linux/kernel.h:19,
                    from include/linux/list.h:9,
                    from include/linux/swait.h:5,
                    from include/linux/completion.h:12,
                    from drivers/iio/imu/bno055/bno055_sl.c:17:
   drivers/iio/imu/bno055/bno055_sl.c:318:30: warning: format '%d' expects argument of type 'int', but argument 5 has type 'size_t' {aka 'long unsigned int'} [-Wformat=]
     318 |  dev_dbg(&priv->serdev->dev, "rd reg 0x%x (len %d)", reg_addr, val_size);
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:134:15: note: in definition of macro '__dynamic_func_call'
     134 |   func(&id, ##__VA_ARGS__);  \
         |               ^~~~~~~~~~~
   include/linux/dynamic_debug.h:166:2: note: in expansion of macro '_dynamic_func_call'
     166 |  _dynamic_func_call(fmt,__dynamic_dev_dbg,   \
         |  ^~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:123:2: note: in expansion of macro 'dynamic_dev_dbg'
     123 |  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |  ^~~~~~~~~~~~~~~
   include/linux/dev_printk.h:123:23: note: in expansion of macro 'dev_fmt'
     123 |  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                       ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:318:2: note: in expansion of macro 'dev_dbg'
     318 |  dev_dbg(&priv->serdev->dev, "rd reg 0x%x (len %d)", reg_addr, val_size);
         |  ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:318:49: note: format string is defined here
     318 |  dev_dbg(&priv->serdev->dev, "rd reg 0x%x (len %d)", reg_addr, val_size);
         |                                                ~^
         |                                                 |
         |                                                 int
         |                                                %ld
   In file included from include/linux/printk.h:456,
                    from include/linux/kernel.h:19,
                    from include/linux/list.h:9,
                    from include/linux/swait.h:5,
                    from include/linux/completion.h:12,
                    from drivers/iio/imu/bno055/bno055_sl.c:17:
   drivers/iio/imu/bno055/bno055_sl.c: In function 'bno055_sl_receive_buf':
   drivers/iio/imu/bno055/bno055_sl.c:394:30: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' {aka 'long unsigned int'} [-Wformat=]
     394 |  dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:134:15: note: in definition of macro '__dynamic_func_call'
     134 |   func(&id, ##__VA_ARGS__);  \
         |               ^~~~~~~~~~~
   include/linux/dynamic_debug.h:166:2: note: in expansion of macro '_dynamic_func_call'
     166 |  _dynamic_func_call(fmt,__dynamic_dev_dbg,   \
         |  ^~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:123:2: note: in expansion of macro 'dynamic_dev_dbg'
     123 |  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |  ^~~~~~~~~~~~~~~
   include/linux/dev_printk.h:123:23: note: in expansion of macro 'dev_fmt'
     123 |  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                       ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:394:2: note: in expansion of macro 'dev_dbg'
     394 |  dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
         |  ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:394:42: note: format string is defined here
     394 |  dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
         |                                         ~^
         |                                          |
         |                                          int
         |                                         %ld
   In file included from include/linux/printk.h:456,
                    from include/linux/kernel.h:19,
                    from include/linux/list.h:9,
                    from include/linux/swait.h:5,
                    from include/linux/completion.h:12,
                    from drivers/iio/imu/bno055/bno055_sl.c:17:
>> drivers/iio/imu/bno055/bno055_sl.c:394:30: warning: field width specifier '*' expects argument of type 'int', but argument 5 has type 'size_t' {aka 'long unsigned int'} [-Wformat=]
     394 |  dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:134:15: note: in definition of macro '__dynamic_func_call'
     134 |   func(&id, ##__VA_ARGS__);  \
         |               ^~~~~~~~~~~
   include/linux/dynamic_debug.h:166:2: note: in expansion of macro '_dynamic_func_call'
     166 |  _dynamic_func_call(fmt,__dynamic_dev_dbg,   \
         |  ^~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:123:2: note: in expansion of macro 'dynamic_dev_dbg'
     123 |  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |  ^~~~~~~~~~~~~~~
   include/linux/dev_printk.h:123:23: note: in expansion of macro 'dev_fmt'
     123 |  dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                       ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:394:2: note: in expansion of macro 'dev_dbg'
     394 |  dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
         |  ^~~~~~~
   drivers/iio/imu/bno055/bno055_sl.c:394:47: note: format string is defined here
     394 |  dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
         |                                              ~^~
         |                                               |
         |                                               int


vim +286 drivers/iio/imu/bno055/bno055_sl.c

   277	
   278	static int bno055_sl_write_reg(void *context, const void *data, size_t count)
   279	{
   280		int ret;
   281		int reg;
   282		u8 *write_data = (u8 *)data + 1;
   283		struct bno055_sl_priv *priv = context;
   284	
   285		if (count < 2) {
 > 286			dev_err(&priv->serdev->dev, "Invalid write count %d", count);
   287			return -EINVAL;
   288		}
   289	
   290		reg = ((u8 *)data)[0];
   291		dev_dbg(&priv->serdev->dev, "wr reg 0x%x = 0x%x", reg, ((u8 *)data)[1]);
   292		ret = bno_sl_send_cmd(priv, 0, reg, count - 1, write_data);
   293	
   294		return ret;
   295	}
   296	
   297	static int bno055_sl_read_reg(void *context,
   298				      const void *reg, size_t reg_size,
   299				      void *val, size_t val_size)
   300	{
   301		int ret;
   302		int reg_addr;
   303		struct bno055_sl_priv *priv = context;
   304	
   305		if (reg_size != 1) {
   306			dev_err(&priv->serdev->dev, "Invalid read regsize %d",
   307				reg_size);
   308			return -EINVAL;
   309		}
   310	
   311		if (val_size > 128) {
   312			dev_err(&priv->serdev->dev, "Invalid read valsize %d",
   313				val_size);
   314			return -EINVAL;
   315		}
   316	
   317		reg_addr = ((u8 *)reg)[0];
   318		dev_dbg(&priv->serdev->dev, "rd reg 0x%x (len %d)", reg_addr, val_size);
   319		mutex_lock(&priv->lock);
   320		priv->expected_data_len = val_size;
   321		priv->response_buf = val;
   322		mutex_unlock(&priv->lock);
   323	
   324		ret = bno_sl_send_cmd(priv, 1, reg_addr, val_size, NULL);
   325	
   326		mutex_lock(&priv->lock);
   327		priv->response_buf = NULL;
   328		mutex_unlock(&priv->lock);
   329	
   330		return ret;
   331	}
   332	
   333	/*
   334	 * Handler for received data; this is called from the reicever callback whenever
   335	 * it got some packet from the serial bus. The status tell us whether the
   336	 * packet is valid (i.e. header ok && received payload len consistent wrt the
   337	 * header). It's now our responsability to check whether this is what we
   338	 * expected, of whether we got some unexpected, yet valid, packet.
   339	 */
   340	static void bno055_sl_handle_rx(struct bno055_sl_priv *priv, int status)
   341	{
   342		mutex_lock(&priv->lock);
   343		switch (priv->expect_response) {
   344		case CMD_NONE:
   345			dev_warn(&priv->serdev->dev, "received unexpected, yet valid, data from sensor");
   346			mutex_unlock(&priv->lock);
   347			return;
   348	
   349		case CMD_READ:
   350			priv->cmd_status = status;
   351			if (status == STATUS_OK &&
   352			    priv->rx.databuf_count != priv->expected_data_len) {
   353				/*
   354				 * If we got here, then the lower layer serial protocol
   355				 * seems consistent with itself; if we got an unexpected
   356				 * amount of data then signal it as a non critical error
   357				 */
   358				priv->cmd_status = STATUS_FAIL;
   359				dev_warn(&priv->serdev->dev, "received an unexpected amount of, yet valid, data from sensor");
   360			}
   361			break;
   362	
   363		case CMD_WRITE:
   364			priv->cmd_status = status;
   365			break;
   366		}
   367	
   368		priv->expect_response = CMD_NONE;
   369		complete(&priv->cmd_complete);
   370		mutex_unlock(&priv->lock);
   371	}
   372	
   373	/*
   374	 * Serdev receiver FSM. This tracks the serial communication and parse the
   375	 * header. It pushes packets to bno055_sl_handle_rx(), eventually communicating
   376	 * failures (i.e. malformed packets).
   377	 * Idellay it doesn't know anything about upper layer (i.e. if this is the
   378	 * packet we were really expecting), but since we copies the payload into the
   379	 * receiver buffer (that is not valid when i.e. we don't expect data), we
   380	 * snoop a bit in the upper layer..
   381	 * Also, we assume to RX one pkt per time (i.e. the HW doesn't send anything
   382	 * unless we require to AND we don't queue more than one request per time).
   383	 */
   384	static int bno055_sl_receive_buf(struct serdev_device *serdev,
   385					 const unsigned char *buf, size_t size)
   386	{
   387		int status;
   388		struct bno055_sl_priv *priv = serdev_device_get_drvdata(serdev);
   389		int _size = size;
   390	
   391		if (size == 0)
   392			return 0;
   393	
 > 394		dev_dbg(&priv->serdev->dev, "recv (len %d): %*ph ", size, size, buf);
   395		switch (priv->rx.state) {
   396		case RX_IDLE:
   397			/*
   398			 * New packet.
   399			 * Check for its 1st byte, that identifies the pkt type.
   400			 */
   401			if (buf[0] != 0xEE && buf[0] != 0xBB) {
   402				dev_err(&priv->serdev->dev,
   403					"Invalid packet start %x", buf[0]);
   404				bno055_sl_handle_rx(priv, STATUS_CRIT);
   405				break;
   406			}
   407			priv->rx.type = buf[0];
   408			priv->rx.state = RX_START;
   409			size--;
   410			buf++;
   411			priv->rx.databuf_count = 0;
   412			fallthrough;
   413	
   414		case RX_START:
   415			/*
   416			 * Packet RX in progress, we expect either 1-byte len or 1-byte
   417			 * status depending by the packet type.
   418			 */
   419			if (size == 0)
   420				break;
   421	
   422			if (priv->rx.type == 0xEE) {
   423				if (size > 1) {
   424					dev_err(&priv->serdev->dev, "EE pkt. Extra data received");
   425					status = STATUS_CRIT;
   426	
   427				} else {
   428					status = (buf[0] == 1) ? STATUS_OK : STATUS_FAIL;
   429				}
   430				bno055_sl_handle_rx(priv, status);
   431				priv->rx.state = RX_IDLE;
   432				break;
   433	
   434			} else {
   435				/*priv->rx.type == 0xBB */
   436				priv->rx.state = RX_DATA;
   437				priv->rx.expected_len = buf[0];
   438				size--;
   439				buf++;
   440			}
   441			fallthrough;
   442	
   443		case RX_DATA:
   444			/* Header parsed; now receiving packet data payload */
   445			if (size == 0)
   446				break;
   447	
   448			if (priv->rx.databuf_count + size > priv->rx.expected_len) {
   449				/*
   450				 * This is a inconsistency in serial protocol, we lost
   451				 * sync and we don't know how to handle further data
   452				 */
   453				dev_err(&priv->serdev->dev, "BB pkt. Extra data received");
   454				bno055_sl_handle_rx(priv, STATUS_CRIT);
   455				priv->rx.state = RX_IDLE;
   456				break;
   457			}
   458	
   459			mutex_lock(&priv->lock);
   460			/*
   461			 * NULL e.g. when read cmd is stale or when no read cmd is
   462			 * actually pending.
   463			 */
   464			if (priv->response_buf &&
   465			    /*
   466			     * Snoop on the upper layer protocol stuff to make sure not
   467			     * to write to an invalid memory. Apart for this, let's the
   468			     * upper layer manage any inconsistency wrt expected data
   469			     * len (as long as the serial protocol is consistent wrt
   470			     * itself (i.e. response header is consistent with received
   471			     * response len.
   472			     */
   473			    (priv->rx.databuf_count + size <= priv->expected_data_len))
   474				memcpy(priv->response_buf + priv->rx.databuf_count,
   475				       buf, size);
   476			mutex_unlock(&priv->lock);
   477	
   478			priv->rx.databuf_count += size;
   479	
   480			/*
   481			 * Reached expected len advertised by the IMU for the current
   482			 * packet. Pass it to the upper layer (for us it is just valid).
   483			 */
   484			if (priv->rx.databuf_count == priv->rx.expected_len) {
   485				bno055_sl_handle_rx(priv, STATUS_OK);
   486				priv->rx.state = RX_IDLE;
   487			}
   488			break;
   489		}
   490	
   491		return _size;
   492	}
   493	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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