tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.4 head: 96624f7bb8d16a983433f4da7f42d18a6acfae12 commit: 1225993d024a369380bf0ff8e8a4786442190cf8 [15/31] ALSA: usb-audio: Fix inconsistent card PM state after resume config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 1225993d024a369380bf0ff8e8a4786442190cf8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from sound/usb/card.c:39: In file included from include/linux/slab.h:14: In file included from include/linux/gfp.h:5: In file included from include/linux/mmzone.h:7: In file included from include/linux/spinlock.h:87: In file included from arch/x86/include/asm/spinlock.h:219: In file included from arch/x86/include/asm/qrwlock.h:5: include/asm-generic/qrwlock.h:93:36: warning: comparison of integers of different signs: 'int' and 'u32' (aka 'unsigned int') [-Wsign-compare] cnts, cnts | _QW_LOCKED) == cnts); ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~ include/linux/compiler.h:181:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from sound/usb/card.c:39: In file included from include/linux/slab.h:107: In file included from include/linux/kasan.h:16: In file included from include/linux/sched.h:61: In file included from include/linux/cgroup-defs.h:16: include/linux/percpu-refcount.h:177:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_add(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:526:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:397:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:52:1: note: expanded from here this_cpu_add_8 ^ arch/x86/include/asm/percpu.h:478:35: note: expanded from macro 'this_cpu_add_8' #define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:130:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? ~~~ ^ ~~ In file included from sound/usb/card.c:39: In file included from include/linux/slab.h:107: In file included from include/linux/kasan.h:16: In file included from include/linux/sched.h:61: In file included from include/linux/cgroup-defs.h:16: include/linux/percpu-refcount.h:276:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_sub(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:536:33: note: expanded from macro 'this_cpu_sub' #define this_cpu_sub(pcp, val) this_cpu_add(pcp, -(typeof(pcp))(val)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:526:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:397:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:356:1: note: expanded from here this_cpu_add_8 ^ arch/x86/include/asm/percpu.h:478:35: note: expanded from macro 'this_cpu_add_8' #define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:130:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? ~~~ ^ ~~ In file included from sound/usb/card.c:42: In file included from include/linux/usb.h:15: In file included from include/linux/interrupt.h:12: In file included from include/linux/hardirq.h:8: In file included from arch/x86/include/asm/hardirq.h:5: In file included from include/linux/irq.h:418: In file included from arch/x86/include/asm/hw_irq.h:26: In file included from arch/x86/include/asm/sections.h:5: arch/x86/include/asm/uaccess.h:754:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) ~~ ^ ~ include/linux/compiler.h:181:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from sound/usb/card.c:42: In file included from include/linux/usb.h:15: In file included from include/linux/interrupt.h:12: In file included from include/linux/hardirq.h:8: In file included from arch/x86/include/asm/hardirq.h:5: In file included from include/linux/irq.h:418: In file included from arch/x86/include/asm/hw_irq.h:26: In file included from arch/x86/include/asm/sections.h:5: arch/x86/include/asm/uaccess.h:772:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) ~~ ^ ~ include/linux/compiler.h:181:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from sound/usb/card.c:52: include/sound/pcm.h:1372:17: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] if (s->number == idx) ~~~~~~~~~ ^ ~~~ sound/usb/card.c:254:18: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (rest_bytes < sizeof(*h1)) { ~~~~~~~~~~ ^ ~~~~~~~~~~~ sound/usb/card.c:451:10: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (len < sizeof(card->longname)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ if (chip->num_suspended_intf == chip->system_suspend) { ~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~ 10 warnings generated. vim +765 sound/usb/card.c 735 736 static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) 737 { 738 struct snd_usb_audio *chip = usb_get_intfdata(intf); 739 struct usb_mixer_interface *mixer; 740 struct list_head *p; 741 int err = 0; 742 743 if (chip == (void *)-1L) 744 return 0; 745 746 atomic_inc(&chip->active); /* avoid autopm */ 747 if (chip->num_suspended_intf > 1) 748 goto out; 749 750 /* 751 * ALSA leaves material resumption to user space 752 * we just notify and restart the mixers 753 */ 754 list_for_each_entry(mixer, &chip->mixer_list, list) { 755 err = snd_usb_mixer_resume(mixer, reset_resume); 756 if (err < 0) 757 goto err_out; 758 } 759 760 list_for_each(p, &chip->midi_list) { 761 snd_usbmidi_resume(p); 762 } 763 764 out: 766 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); 767 chip->system_suspend = 0; 768 } 769 chip->num_suspended_intf--; 770 771 err_out: 772 atomic_dec(&chip->active); /* allow autopm after this point */ 773 return err; 774 } 775 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org