[linux-next:master 4870/6658] drivers/dma/bcm2835-dma.c:878:12: warning: 'bcm2835_dma_suspend_late' defined but not used

[linux-next:master 4870/6658] drivers/dma/bcm2835-dma.c:878:12: warning: 'bcm2835_dma_suspend_late' defined but not used

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   4e16367cfe0ce395f29d0482b78970cce8e1db73
commit: 9602a843cb3a16df8930eb9b046aa7aeb769521b [4870/6658] dmaengine: bcm2835-dma: Prevent suspend if DMA channel is busy
config: arm-randconfig-004-20250107 (https://download.01.org/0day-ci/archive/20250107/202501071533.yrFb156H-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250107/202501071533.yrFb156H-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/202501071533.yrFb156H-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/dma/bcm2835-dma.c:878:12: warning: 'bcm2835_dma_suspend_late' defined but not used [-Wunused-function]
     878 | static int bcm2835_dma_suspend_late(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/bcm2835_dma_suspend_late +878 drivers/dma/bcm2835-dma.c

   877	
 > 878	static int bcm2835_dma_suspend_late(struct device *dev)
   879	{
   880		struct bcm2835_dmadev *od = dev_get_drvdata(dev);
   881		struct bcm2835_chan *c, *next;
   882	
   883		list_for_each_entry_safe(c, next, &od->ddev.channels,
   884					 vc.chan.device_node) {
   885			void __iomem *chan_base = c->chan_base;
   886	
   887			/* Check if DMA channel is busy */
   888			if (readl(chan_base + BCM2835_DMA_ADDR))
   889				return -EBUSY;
   890		}
   891	
   892		return 0;
   893	}
   894	

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