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Message-ID: <202408050633.0nI12cmo-lkp@intel.com>
Date: Mon, 5 Aug 2024 06:31:23 +0800
From: kernel test robot <lkp@...el.com>
To: Takashi Sakamoto <o-takashi@...amocchi.jp>,
linux1394-devel@...ts.sourceforge.net
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 17/17] firewire: ohci: use guard macro to serialize
operations for isochronous contexts
Hi Takashi,
kernel test robot noticed the following build warnings:
[auto build test WARNING on ieee1394-linux1394/for-next]
[also build test WARNING on ieee1394-linux1394/for-linus linus/master v6.11-rc1 next-20240802]
[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/Takashi-Sakamoto/firewire-core-use-guard-macro-to-maintain-static-packet-data-for-phy-configuration/20240804-210645
base: https://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394.git for-next
patch link: https://lore.kernel.org/r/20240804130225.243496-18-o-takashi%40sakamocchi.jp
patch subject: [PATCH 17/17] firewire: ohci: use guard macro to serialize operations for isochronous contexts
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20240805/202408050633.0nI12cmo-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240805/202408050633.0nI12cmo-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202408050633.0nI12cmo-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/firewire/ohci.c:3138:2: warning: label followed by a declaration is a C23 extension [-Wc23-extensions]
3138 | guard(spinlock_irq)(&ohci->lock);
| ^
include/linux/cleanup.h:167:2: note: expanded from macro 'guard'
167 | CLASS(_name, __UNIQUE_ID(guard))
| ^
include/linux/cleanup.h:122:2: note: expanded from macro 'CLASS'
122 | class_##_name##_t var __cleanup(class_##_name##_destructor) = \
| ^
<scratch space>:86:1: note: expanded from here
86 | class_spinlock_irq_t
| ^
1 warning generated.
vim +3138 drivers/firewire/ohci.c
3059
3060 static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
3061 int type, int channel, size_t header_size)
3062 {
3063 struct fw_ohci *ohci = fw_ohci(card);
3064 struct iso_context *ctx;
3065 descriptor_callback_t callback;
3066 u64 *channels;
3067 u32 *mask, regs;
3068 int index, ret = -EBUSY;
3069
3070 scoped_guard(spinlock_irq, &ohci->lock) {
3071 switch (type) {
3072 case FW_ISO_CONTEXT_TRANSMIT:
3073 mask = &ohci->it_context_mask;
3074 callback = handle_it_packet;
3075 index = ffs(*mask) - 1;
3076 if (index >= 0) {
3077 *mask &= ~(1 << index);
3078 regs = OHCI1394_IsoXmitContextBase(index);
3079 ctx = &ohci->it_context_list[index];
3080 }
3081 break;
3082
3083 case FW_ISO_CONTEXT_RECEIVE:
3084 channels = &ohci->ir_context_channels;
3085 mask = &ohci->ir_context_mask;
3086 callback = handle_ir_packet_per_buffer;
3087 index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1;
3088 if (index >= 0) {
3089 *channels &= ~(1ULL << channel);
3090 *mask &= ~(1 << index);
3091 regs = OHCI1394_IsoRcvContextBase(index);
3092 ctx = &ohci->ir_context_list[index];
3093 }
3094 break;
3095
3096 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3097 mask = &ohci->ir_context_mask;
3098 callback = handle_ir_buffer_fill;
3099 index = !ohci->mc_allocated ? ffs(*mask) - 1 : -1;
3100 if (index >= 0) {
3101 ohci->mc_allocated = true;
3102 *mask &= ~(1 << index);
3103 regs = OHCI1394_IsoRcvContextBase(index);
3104 ctx = &ohci->ir_context_list[index];
3105 }
3106 break;
3107
3108 default:
3109 index = -1;
3110 ret = -ENOSYS;
3111 }
3112
3113 if (index < 0)
3114 return ERR_PTR(ret);
3115 }
3116
3117 memset(ctx, 0, sizeof(*ctx));
3118 ctx->header_length = 0;
3119 ctx->header = (void *) __get_free_page(GFP_KERNEL);
3120 if (ctx->header == NULL) {
3121 ret = -ENOMEM;
3122 goto out;
3123 }
3124 ret = context_init(&ctx->context, ohci, regs, callback);
3125 if (ret < 0)
3126 goto out_with_header;
3127
3128 if (type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) {
3129 set_multichannel_mask(ohci, 0);
3130 ctx->mc_completed = 0;
3131 }
3132
3133 return &ctx->base;
3134
3135 out_with_header:
3136 free_page((unsigned long)ctx->header);
3137 out:
> 3138 guard(spinlock_irq)(&ohci->lock);
3139
3140 switch (type) {
3141 case FW_ISO_CONTEXT_RECEIVE:
3142 *channels |= 1ULL << channel;
3143 break;
3144
3145 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
3146 ohci->mc_allocated = false;
3147 break;
3148 }
3149 *mask |= 1 << index;
3150
3151 return ERR_PTR(ret);
3152 }
3153
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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