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Message-ID: <202312030500.WC4krvMp-lkp@intel.com>
Date:   Sun, 3 Dec 2023 14:31:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Subject: drivers/cpufreq/powernv-cpufreq.c:521:50: sparse: sparse: incorrect
 type in assignment (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   815fb87b753055df2d9e50f6cd80eb10235fe3e9
commit: c89f2682a39192433c296bf97b834fd2815a758b cpufreq: powernv: Replace pr_info with trace print for throttle event
date:   8 years ago
config: powerpc64-randconfig-r113-20231107 (https://download.01.org/0day-ci/archive/20231203/202312030500.WC4krvMp-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231203/202312030500.WC4krvMp-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/202312030500.WC4krvMp-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/cpufreq/powernv-cpufreq.c:190:18: sparse: sparse: symbol 'cpufreq_freq_attr_cpuinfo_nominal_freq' was not declared. Should it be static?
   drivers/cpufreq/powernv-cpufreq.c:436:6: sparse: sparse: symbol 'powernv_cpufreq_work_fn' was not declared. Should it be static?
   drivers/cpufreq/powernv-cpufreq.c:476:19: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be64 [usertype] type @@     got unsigned long long @@
   drivers/cpufreq/powernv-cpufreq.c:476:19: sparse:     expected restricted __be64 [usertype] type
   drivers/cpufreq/powernv-cpufreq.c:476:19: sparse:     got unsigned long long
   drivers/cpufreq/powernv-cpufreq.c:499:27: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be64 [usertype] chip @@     got unsigned long long @@
   drivers/cpufreq/powernv-cpufreq.c:499:27: sparse:     expected restricted __be64 [usertype] chip
   drivers/cpufreq/powernv-cpufreq.c:499:27: sparse:     got unsigned long long
   drivers/cpufreq/powernv-cpufreq.c:500:38: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be64 [usertype] throttle_status @@     got unsigned long long @@
   drivers/cpufreq/powernv-cpufreq.c:500:38: sparse:     expected restricted __be64 [usertype] throttle_status
   drivers/cpufreq/powernv-cpufreq.c:500:38: sparse:     got unsigned long long
   drivers/cpufreq/powernv-cpufreq.c:516:48: sparse: sparse: restricted __be64 degrades to integer
   drivers/cpufreq/powernv-cpufreq.c:519:25: sparse: sparse: restricted __be64 degrades to integer
   drivers/cpufreq/powernv-cpufreq.c:520:25: sparse: sparse: restricted __be64 degrades to integer
>> drivers/cpufreq/powernv-cpufreq.c:521:50: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned char [usertype] throttle_reason @@     got restricted __be64 [usertype] throttle_status @@
   drivers/cpufreq/powernv-cpufreq.c:521:50: sparse:     expected unsigned char [usertype] throttle_reason
   drivers/cpufreq/powernv-cpufreq.c:521:50: sparse:     got restricted __be64 [usertype] throttle_status
   drivers/cpufreq/powernv-cpufreq.c:478:21: sparse: sparse: restricted __be64 degrades to integer
   drivers/cpufreq/powernv-cpufreq.c:478:21: sparse: sparse: restricted __be64 degrades to integer
   drivers/cpufreq/powernv-cpufreq.c:436:6: warning: no previous prototype for 'powernv_cpufreq_work_fn' [-Wmissing-prototypes]
     436 | void powernv_cpufreq_work_fn(struct work_struct *work)
         |      ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/cpufreq/powernv-cpufreq.c: In function 'powernv_cpufreq_occ_msg':
   drivers/cpufreq/powernv-cpufreq.c:519:42: warning: comparison of unsigned expression in '>= 0' is always true [-Wtype-limits]
     519 |                 if (omsg.throttle_status >= 0 &&
         |                                          ^~

vim +521 drivers/cpufreq/powernv-cpufreq.c

   465	
   466	static int powernv_cpufreq_occ_msg(struct notifier_block *nb,
   467					   unsigned long msg_type, void *_msg)
   468	{
   469		struct opal_msg *msg = _msg;
   470		struct opal_occ_msg omsg;
   471		int i;
   472	
   473		if (msg_type != OPAL_MSG_OCC)
   474			return 0;
   475	
   476		omsg.type = be64_to_cpu(msg->params[0]);
   477	
   478		switch (omsg.type) {
   479		case OCC_RESET:
   480			occ_reset = true;
   481			pr_info("OCC (On Chip Controller - enforces hard thermal/power limits) Resetting\n");
   482			/*
   483			 * powernv_cpufreq_throttle_check() is called in
   484			 * target() callback which can detect the throttle state
   485			 * for governors like ondemand.
   486			 * But static governors will not call target() often thus
   487			 * report throttling here.
   488			 */
   489			if (!throttled) {
   490				throttled = true;
   491				pr_warn("CPU frequency is throttled for duration\n");
   492			}
   493	
   494			break;
   495		case OCC_LOAD:
   496			pr_info("OCC Loading, CPU frequency is throttled until OCC is started\n");
   497			break;
   498		case OCC_THROTTLE:
   499			omsg.chip = be64_to_cpu(msg->params[1]);
   500			omsg.throttle_status = be64_to_cpu(msg->params[2]);
   501	
   502			if (occ_reset) {
   503				occ_reset = false;
   504				throttled = false;
   505				pr_info("OCC Active, CPU frequency is no longer throttled\n");
   506	
   507				for (i = 0; i < nr_chips; i++) {
   508					chips[i].restore = true;
   509					schedule_work(&chips[i].throttle);
   510				}
   511	
   512				return 0;
   513			}
   514	
   515			for (i = 0; i < nr_chips; i++)
   516				if (chips[i].id == omsg.chip)
   517					break;
   518	
   519			if (omsg.throttle_status >= 0 &&
   520			    omsg.throttle_status <= OCC_MAX_THROTTLE_STATUS)
 > 521				chips[i].throttle_reason = omsg.throttle_status;
   522	
   523			if (!omsg.throttle_status)
   524				chips[i].restore = true;
   525	
   526			schedule_work(&chips[i].throttle);
   527		}
   528		return 0;
   529	}
   530	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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