drivers/ptp/ptp_idt82p33.c:1008:12: warning: stack frame size of 9088 bytes in function 'idt82p33_probe'

drivers/ptp/ptp_idt82p33.c:1008:12: warning: stack frame size of 9088 bytes in function 'idt82p33_probe'

[kernel test robot]

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Hi Min,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   88b06399c9c766c283e070b022b5ceafa4f63f19
commit: e4c6eb68343fb1cfe4bffc6802180e91826f76af ptp: idt82p33: use i2c_master_send for bus write
date:   6 months ago
config: riscv-randconfig-r022-20210512 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a0fed635fe1701470062495a6ffee1c608f3f1bc)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4c6eb68343fb1cfe4bffc6802180e91826f76af
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e4c6eb68343fb1cfe4bffc6802180e91826f76af
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/ptp/ptp_idt82p33.c:1008:12: warning: stack frame size of 9088 bytes in function 'idt82p33_probe' [-Wframe-larger-than=]
   static int idt82p33_probe(struct i2c_client *client,
              ^
   1 warning generated.


vim +/idt82p33_probe +1008 drivers/ptp/ptp_idt82p33.c

57a10d8c112306 Min Li 2020-02-21  1006  
57a10d8c112306 Min Li 2020-02-21  1007  
57a10d8c112306 Min Li 2020-02-21 @1008  static int idt82p33_probe(struct i2c_client *client,
57a10d8c112306 Min Li 2020-02-21  1009  			  const struct i2c_device_id *id)
57a10d8c112306 Min Li 2020-02-21  1010  {
57a10d8c112306 Min Li 2020-02-21  1011  	struct idt82p33 *idt82p33;
57a10d8c112306 Min Li 2020-02-21  1012  	int err;
57a10d8c112306 Min Li 2020-02-21  1013  	u8 i;
57a10d8c112306 Min Li 2020-02-21  1014  
57a10d8c112306 Min Li 2020-02-21  1015  	(void)id;
57a10d8c112306 Min Li 2020-02-21  1016  
57a10d8c112306 Min Li 2020-02-21  1017  	idt82p33 = devm_kzalloc(&client->dev,
57a10d8c112306 Min Li 2020-02-21  1018  				sizeof(struct idt82p33), GFP_KERNEL);
57a10d8c112306 Min Li 2020-02-21  1019  	if (!idt82p33)
57a10d8c112306 Min Li 2020-02-21  1020  		return -ENOMEM;
57a10d8c112306 Min Li 2020-02-21  1021  
57a10d8c112306 Min Li 2020-02-21  1022  	mutex_init(&idt82p33->reg_lock);
57a10d8c112306 Min Li 2020-02-21  1023  
57a10d8c112306 Min Li 2020-02-21  1024  	idt82p33->client = client;
57a10d8c112306 Min Li 2020-02-21  1025  	idt82p33->page_offset = 0xff;
57a10d8c112306 Min Li 2020-02-21  1026  	idt82p33->tod_write_overhead_ns = 0;
57a10d8c112306 Min Li 2020-02-21  1027  	idt82p33->calculate_overhead_flag = 0;
57a10d8c112306 Min Li 2020-02-21  1028  	idt82p33->pll_mask = DEFAULT_PLL_MASK;
57a10d8c112306 Min Li 2020-02-21  1029  	idt82p33->channel[0].output_mask = DEFAULT_OUTPUT_MASK_PLL0;
57a10d8c112306 Min Li 2020-02-21  1030  	idt82p33->channel[1].output_mask = DEFAULT_OUTPUT_MASK_PLL1;
57a10d8c112306 Min Li 2020-02-21  1031  
57a10d8c112306 Min Li 2020-02-21  1032  	mutex_lock(&idt82p33->reg_lock);
57a10d8c112306 Min Li 2020-02-21  1033  
57a10d8c112306 Min Li 2020-02-21  1034  	err = idt82p33_load_firmware(idt82p33);
57a10d8c112306 Min Li 2020-02-21  1035  
57a10d8c112306 Min Li 2020-02-21  1036  	if (err)
57a10d8c112306 Min Li 2020-02-21  1037  		dev_warn(&idt82p33->client->dev,
57a10d8c112306 Min Li 2020-02-21  1038  			 "loading firmware failed with %d\n", err);
57a10d8c112306 Min Li 2020-02-21  1039  
57a10d8c112306 Min Li 2020-02-21  1040  	if (idt82p33->pll_mask) {
57a10d8c112306 Min Li 2020-02-21  1041  		for (i = 0; i < MAX_PHC_PLL; i++) {
57a10d8c112306 Min Li 2020-02-21  1042  			if (idt82p33->pll_mask & (1 << i)) {
57a10d8c112306 Min Li 2020-02-21  1043  				err = idt82p33_enable_channel(idt82p33, i);
e014ae39493f6d Min Li 2020-11-05  1044  				if (err) {
e014ae39493f6d Min Li 2020-11-05  1045  					dev_err(&idt82p33->client->dev,
e014ae39493f6d Min Li 2020-11-05  1046  						"Failed in %s with err %d!\n",
e014ae39493f6d Min Li 2020-11-05  1047  						__func__, err);
57a10d8c112306 Min Li 2020-02-21  1048  					break;
57a10d8c112306 Min Li 2020-02-21  1049  				}
57a10d8c112306 Min Li 2020-02-21  1050  			}
e014ae39493f6d Min Li 2020-11-05  1051  		}
57a10d8c112306 Min Li 2020-02-21  1052  	} else {
57a10d8c112306 Min Li 2020-02-21  1053  		dev_err(&idt82p33->client->dev,
57a10d8c112306 Min Li 2020-02-21  1054  			"no PLLs flagged as PHCs, nothing to do\n");
57a10d8c112306 Min Li 2020-02-21  1055  		err = -ENODEV;
57a10d8c112306 Min Li 2020-02-21  1056  	}
57a10d8c112306 Min Li 2020-02-21  1057  
57a10d8c112306 Min Li 2020-02-21  1058  	mutex_unlock(&idt82p33->reg_lock);
57a10d8c112306 Min Li 2020-02-21  1059  
57a10d8c112306 Min Li 2020-02-21  1060  	if (err) {
57a10d8c112306 Min Li 2020-02-21  1061  		idt82p33_ptp_clock_unregister_all(idt82p33);
57a10d8c112306 Min Li 2020-02-21  1062  		return err;
57a10d8c112306 Min Li 2020-02-21  1063  	}
57a10d8c112306 Min Li 2020-02-21  1064  
57a10d8c112306 Min Li 2020-02-21  1065  	i2c_set_clientdata(client, idt82p33);
57a10d8c112306 Min Li 2020-02-21  1066  
57a10d8c112306 Min Li 2020-02-21  1067  	return 0;
57a10d8c112306 Min Li 2020-02-21  1068  }
57a10d8c112306 Min Li 2020-02-21  1069  

:::::: The code at line 1008 was first introduced by commit
:::::: 57a10d8c1123068e3cb06434fbc9634f945d3062 ptp: Add a ptp clock driver for IDT 82P33 SMU.

:::::: TO: Min Li <min.li.xe@renesas.com>
:::::: CC: David S. Miller <davem@davemloft.net>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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