[linux-next:master 8604/9696] drivers/firewire/core-card.c:552:32: warning: overflow in expression; result is -1'179'869'184 with type 'long'

[linux-next:master 8604/9696] drivers/firewire/core-card.c:552:32: warning: overflow in expression; result is -1'179'869'184 with type 'long'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   05af764719214d6568adb55c8749dec295228da8
commit: 379b870c28c6a615a101df7986eba70fea99eff7 [8604/9696] firewire: core: use helper macros instead of direct access to HZ
config: hexagon-randconfig-001-20250916 (https://download.01.org/0day-ci/archive/20250917/202509170136.b5ZHaNAV-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 65ad21d730d25789454d18e811f8ff5db79cb5d4)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250917/202509170136.b5ZHaNAV-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509170136.b5ZHaNAV-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/firewire/core-card.c:552:32: warning: overflow in expression; result is -1'179'869'184 with type 'long' [-Winteger-overflow]
     552 |         card->split_timeout_jiffies = isoc_cycles_to_jiffies(DEFAULT_SPLIT_TIMEOUT);
         |                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/firewire/core.h:33:64: note: expanded from macro 'isoc_cycles_to_jiffies'
      33 | #define isoc_cycles_to_jiffies(cycles)  usecs_to_jiffies(cycles * USEC_PER_SEC / 8000)
         |                                                          ~~~~~~~^~~~~~~~~~~~~~
   1 warning generated.


vim +552 drivers/firewire/core-card.c

   537	
   538	void fw_card_initialize(struct fw_card *card,
   539				const struct fw_card_driver *driver,
   540				struct device *device)
   541	{
   542		static atomic_t index = ATOMIC_INIT(-1);
   543	
   544		card->index = atomic_inc_return(&index);
   545		card->driver = driver;
   546		card->device = device;
   547		card->current_tlabel = 0;
   548		card->tlabel_mask = 0;
   549		card->split_timeout_hi = DEFAULT_SPLIT_TIMEOUT / 8000;
   550		card->split_timeout_lo = (DEFAULT_SPLIT_TIMEOUT % 8000) << 19;
   551		card->split_timeout_cycles = DEFAULT_SPLIT_TIMEOUT;
 > 552		card->split_timeout_jiffies = isoc_cycles_to_jiffies(DEFAULT_SPLIT_TIMEOUT);
   553		card->color = 0;
   554		card->broadcast_channel = BROADCAST_CHANNEL_INITIAL;
   555	
   556		kref_init(&card->kref);
   557		init_completion(&card->done);
   558		INIT_LIST_HEAD(&card->transaction_list);
   559		INIT_LIST_HEAD(&card->phy_receiver_list);
   560		spin_lock_init(&card->lock);
   561	
   562		card->local_node = NULL;
   563	
   564		INIT_DELAYED_WORK(&card->br_work, br_work);
   565		INIT_DELAYED_WORK(&card->bm_work, bm_work);
   566	}
   567	EXPORT_SYMBOL(fw_card_initialize);
   568	

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