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

From: kernel test robot
Date: Wed May 12 2021 - 09:34:05 EST

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@xxxxxxxxx>

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@xxxxxxxxxxx>
:::::: CC: David S. Miller <davem@xxxxxxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip