Re: [RFC PATCH 6/6] pcie/cxl_timeout: Add CXL.mem Timeout & Isolation interrupt support

[kernel test robot <lkp@intel.com>]

Hi Ben,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on pci/next]
[also build test WARNING on pci/for-linus cxl/next cxl/pending linus/master v6.8-rc4 next-20240216]
[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/Ben-Cheatham/cxl-core-Add-CXL-Timeout-Isolation-capability-parsing/20240216-034328
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next
patch link:    https://lore.kernel.org/r/20240215194048.141411-7-Benjamin.Cheatham%40amd.com
patch subject: [RFC PATCH 6/6] pcie/cxl_timeout: Add CXL.mem Timeout & Isolation interrupt support
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20240218/202402180558.S6rTa5mq-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240218/202402180558.S6rTa5mq-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/202402180558.S6rTa5mq-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/pci/pcie/cxl_timeout.c:231:13: warning: no previous prototype for 'cxl_timeout_thread' [-Wmissing-prototypes]
     231 | irqreturn_t cxl_timeout_thread(int irq, void *data)
         |             ^~~~~~~~~~~~~~~~~~


vim +/cxl_timeout_thread +231 drivers/pci/pcie/cxl_timeout.c

   230	
 > 231	irqreturn_t cxl_timeout_thread(int irq, void *data)
   232	{
   233		struct cxl_timeout_wq_data *wq_data;
   234		struct cxl_timeout *cxlt = data;
   235		struct pcie_device *pcie_dev = cxlt->dev;
   236		struct pcie_cxlt_data *pdata;
   237		struct cxl_dport *dport;
   238		u32 status;
   239	
   240		/*
   241		 * If the CXL core didn't register a cxl_dport with this PCIe device,
   242		 * then dport enumeration failed and there's nothing to do CXL-wise.
   243		 */
   244		pdata = get_service_data(pcie_dev);
   245		if (!pdata || !pdata->dport)
   246			return IRQ_HANDLED;
   247	
   248		dport = pdata->dport;
   249	
   250		status = readl(cxlt->regs + CXL_TIMEOUT_STATUS_OFFSET);
   251		if (!(status & CXL_TIMEOUT_STATUS_MEM_ISO
   252		      || status & CXL_TIMEOUT_STATUS_MEM_TIMEOUT))
   253			return IRQ_HANDLED;
   254	
   255		dport->isolated = true;
   256	
   257		wq_data = kzalloc(sizeof(struct cxl_timeout_wq_data), GFP_NOWAIT);
   258		if (!wq_data)
   259			return IRQ_NONE;
   260	
   261		wq_data->dport = dport;
   262	
   263		INIT_WORK(&wq_data->w, cxl_timeout_handler);
   264		queue_work(cxl_timeout_wq, &wq_data->w);
   265	
   266		return IRQ_HANDLED;
   267	}
   268	

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