Hi Heiko, kernel test robot noticed the following build warnings: [auto build test WARNING on next-20240801] [also build test WARNING on v6.11-rc1] [cannot apply to groeck-staging/hwmon-next lee-leds/for-leds-next lee-mfd/for-mfd-next lee-mfd/for-mfd-fixes linus/master v6.11-rc1 v6.10 v6.10-rc7] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Heiko-Stuebner/dt-bindings-mfd-add-binding-for-qnap-ts433-mcu-devices/20240802-103948 base: next-20240801 patch link: https://lore.kernel.org/r/20240731212430.2677900-3-heiko%40sntech.de patch subject: [PATCH v3 2/7] mfd: add base driver for qnap-mcu devices config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240804/202408040850.uHsR1c30-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 423aec6573df4424f90555468128e17073ddc69e) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240804/202408040850.uHsR1c30-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202408040850.uHsR1c30-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/mfd/qnap-mcu.c:17: In file included from include/linux/serdev.h:10: In file included from include/linux/iopoll.h:14: In file included from include/linux/io.h:14: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 548 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from drivers/mfd/qnap-mcu.c:17: In file included from include/linux/serdev.h:10: In file included from include/linux/iopoll.h:14: In file included from include/linux/io.h:14: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from drivers/mfd/qnap-mcu.c:17: In file included from include/linux/serdev.h:10: In file included from include/linux/iopoll.h:14: In file included from include/linux/io.h:14: In file included from arch/hexagon/include/asm/io.h:328: include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 585 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ >> drivers/mfd/qnap-mcu.c:109:5: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat] 108 | dev_warn(dev, "received %lu bytes, we were not waiting for\n", | ~~~ | %zu 109 | size); | ^~~~ include/linux/dev_printk.h:156:70: note: expanded from macro 'dev_warn' 156 | dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__) | ~~~ ^~~~~~~~~~~ include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ~~~ ^~~~~~~~~~~ 7 warnings generated. vim +109 drivers/mfd/qnap-mcu.c 96 97 static size_t qnap_mcu_receive_buf(struct serdev_device *serdev, 98 const u8 *buf, size_t size) 99 { 100 struct device *dev = &serdev->dev; 101 struct qnap_mcu *mcu = dev_get_drvdata(dev); 102 struct qnap_mcu_reply *reply = mcu->reply; 103 const u8 *src = buf; 104 const u8 *end = buf + size; 105 106 mutex_lock(&mcu->reply_lock); 107 if (!reply) { 108 dev_warn(dev, "received %lu bytes, we were not waiting for\n", > 109 size); 110 mutex_unlock(&mcu->reply_lock); 111 return size; 112 } 113 114 while (src < end) { 115 reply->data[reply->received] = *src++; 116 reply->received++; 117 118 if (reply->received == reply->length) { 119 complete(&reply->done); 120 mutex_unlock(&mcu->reply_lock); 121 122 /* 123 * We report the consumed number of bytes. If there 124 * are still bytes remaining (though there shouldn't) 125 * the serdev layer will re-execute this handler with 126 * the remainder of the Rx bytes. 127 */ 128 return src - buf; 129 } 130 } 131 132 /* 133 * The only way to get out of the above loop and end up here 134 * is through consuming all of the supplied data, so here we 135 * report that we processed it all. 136 */ 137 mutex_unlock(&mcu->reply_lock); 138 return size; 139 } 140 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
