drivers/ntb/hw/idt/ntb_hw_idt.c:1116:1: warning: the frame size of 1032 bytes is larger than 1024 bytes

From: kernel test robot
Date: Mon Nov 23 2020 - 03:35:59 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 418baf2c28f3473039f2f7377760bd8f6897ae18
commit: f2c9699f65557a31fed4ddb9e5b4d9489b1bf32f riscv: Add STACKPROTECTOR supported
date: 4 months ago
config: riscv-randconfig-r035-20201123 (attached as .config)
compiler: riscv32-linux-gcc (GCC) 9.3.0
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2c9699f65557a31fed4ddb9e5b4d9489b1bf32f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout f2c9699f65557a31fed4ddb9e5b4d9489b1bf32f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross 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/ntb/hw/idt/ntb_hw_idt.c: In function 'idt_scan_mws':
>> drivers/ntb/hw/idt/ntb_hw_idt.c:1116:1: warning: the frame size of 1032 bytes is larger than 1024 bytes [-Wframe-larger-than=]
1116 | }
| ^

vim +1116 drivers/ntb/hw/idt/ntb_hw_idt.c

bf2a952d31d2cd2 Serge Semin 2017-04-12 1029
bf2a952d31d2cd2 Serge Semin 2017-04-12 1030 /*
bf2a952d31d2cd2 Serge Semin 2017-04-12 1031 * idt_scan_mws() - scan memory windows of the port
bf2a952d31d2cd2 Serge Semin 2017-04-12 1032 * @ndev: IDT NTB hardware driver descriptor
bf2a952d31d2cd2 Serge Semin 2017-04-12 1033 * @port: Port to get number of memory windows for
bf2a952d31d2cd2 Serge Semin 2017-04-12 1034 * @mw_cnt: Out - number of memory windows
bf2a952d31d2cd2 Serge Semin 2017-04-12 1035 *
bf2a952d31d2cd2 Serge Semin 2017-04-12 1036 * It walks over BAR setup registers of the specified port and determines
bf2a952d31d2cd2 Serge Semin 2017-04-12 1037 * the memory windows parameters if any activated.
bf2a952d31d2cd2 Serge Semin 2017-04-12 1038 *
bf2a952d31d2cd2 Serge Semin 2017-04-12 1039 * Return: array of memory windows
bf2a952d31d2cd2 Serge Semin 2017-04-12 1040 */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1041 static struct idt_mw_cfg *idt_scan_mws(struct idt_ntb_dev *ndev, int port,
bf2a952d31d2cd2 Serge Semin 2017-04-12 1042 unsigned char *mw_cnt)
bf2a952d31d2cd2 Serge Semin 2017-04-12 1043 {
bf2a952d31d2cd2 Serge Semin 2017-04-12 1044 struct idt_mw_cfg mws[IDT_MAX_NR_MWS], *ret_mws;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1045 const struct idt_ntb_bar *bars;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1046 enum idt_mw_type mw_type;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1047 unsigned char widx, bidx, en_cnt;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1048 bool bar_64bit = false;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1049 int aprt_size;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1050 u32 data;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1051
bf2a952d31d2cd2 Serge Semin 2017-04-12 1052 /* Retrieve the array of the BARs registers */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1053 bars = portdata_tbl[port].bars;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1054
bf2a952d31d2cd2 Serge Semin 2017-04-12 1055 /* Scan all the BARs belonging to the port */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1056 *mw_cnt = 0;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1057 for (bidx = 0; bidx < IDT_BAR_CNT; bidx += 1 + bar_64bit) {
bf2a952d31d2cd2 Serge Semin 2017-04-12 1058 /* Read BARSETUP register value */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1059 data = idt_sw_read(ndev, bars[bidx].setup);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1060
bf2a952d31d2cd2 Serge Semin 2017-04-12 1061 /* Skip disabled BARs */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1062 if (!(data & IDT_BARSETUP_EN)) {
bf2a952d31d2cd2 Serge Semin 2017-04-12 1063 bar_64bit = false;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1064 continue;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1065 }
bf2a952d31d2cd2 Serge Semin 2017-04-12 1066
bf2a952d31d2cd2 Serge Semin 2017-04-12 1067 /* Skip next BARSETUP if current one has 64bit addressing */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1068 bar_64bit = IS_FLD_SET(BARSETUP_TYPE, data, 64);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1069
bf2a952d31d2cd2 Serge Semin 2017-04-12 1070 /* Skip configuration space mapping BARs */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1071 if (data & IDT_BARSETUP_MODE_CFG)
bf2a952d31d2cd2 Serge Semin 2017-04-12 1072 continue;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1073
bf2a952d31d2cd2 Serge Semin 2017-04-12 1074 /* Retrieve MW type/entries count and aperture size */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1075 mw_type = GET_FIELD(BARSETUP_ATRAN, data);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1076 en_cnt = idt_get_mw_count(mw_type);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1077 aprt_size = (u64)1 << GET_FIELD(BARSETUP_SIZE, data);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1078
bf2a952d31d2cd2 Serge Semin 2017-04-12 1079 /* Save configurations of all available memory windows */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1080 for (widx = 0; widx < en_cnt; widx++, (*mw_cnt)++) {
bf2a952d31d2cd2 Serge Semin 2017-04-12 1081 /*
bf2a952d31d2cd2 Serge Semin 2017-04-12 1082 * IDT can expose a limited number of MWs, so it's bug
bf2a952d31d2cd2 Serge Semin 2017-04-12 1083 * to have more than the driver expects
bf2a952d31d2cd2 Serge Semin 2017-04-12 1084 */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1085 if (*mw_cnt >= IDT_MAX_NR_MWS)
bf2a952d31d2cd2 Serge Semin 2017-04-12 1086 return ERR_PTR(-EINVAL);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1087
bf2a952d31d2cd2 Serge Semin 2017-04-12 1088 /* Save basic MW info */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1089 mws[*mw_cnt].type = mw_type;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1090 mws[*mw_cnt].bar = bidx;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1091 mws[*mw_cnt].idx = widx;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1092 /* It's always DWORD aligned */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1093 mws[*mw_cnt].addr_align = IDT_TRANS_ALIGN;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1094 /* DIR and LUT approachs differently configure MWs */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1095 if (mw_type == IDT_MW_DIR)
bf2a952d31d2cd2 Serge Semin 2017-04-12 1096 mws[*mw_cnt].size_max = aprt_size;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1097 else if (mw_type == IDT_MW_LUT12)
bf2a952d31d2cd2 Serge Semin 2017-04-12 1098 mws[*mw_cnt].size_max = aprt_size / 16;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1099 else
bf2a952d31d2cd2 Serge Semin 2017-04-12 1100 mws[*mw_cnt].size_max = aprt_size / 32;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1101 mws[*mw_cnt].size_align = (mw_type == IDT_MW_DIR) ?
bf2a952d31d2cd2 Serge Semin 2017-04-12 1102 IDT_DIR_SIZE_ALIGN : mws[*mw_cnt].size_max;
bf2a952d31d2cd2 Serge Semin 2017-04-12 1103 }
bf2a952d31d2cd2 Serge Semin 2017-04-12 1104 }
bf2a952d31d2cd2 Serge Semin 2017-04-12 1105
bf2a952d31d2cd2 Serge Semin 2017-04-12 1106 /* Allocate memory for memory window descriptors */
1b7619828d0c341 Gustavo A. R. Silva 2018-08-27 1107 ret_mws = devm_kcalloc(&ndev->ntb.pdev->dev, *mw_cnt, sizeof(*ret_mws),
1b7619828d0c341 Gustavo A. R. Silva 2018-08-27 1108 GFP_KERNEL);
1b7619828d0c341 Gustavo A. R. Silva 2018-08-27 1109 if (!ret_mws)
bf2a952d31d2cd2 Serge Semin 2017-04-12 1110 return ERR_PTR(-ENOMEM);
bf2a952d31d2cd2 Serge Semin 2017-04-12 1111
bf2a952d31d2cd2 Serge Semin 2017-04-12 1112 /* Copy the info of detected memory windows */
bf2a952d31d2cd2 Serge Semin 2017-04-12 1113 memcpy(ret_mws, mws, (*mw_cnt)*sizeof(*ret_mws));
bf2a952d31d2cd2 Serge Semin 2017-04-12 1114
bf2a952d31d2cd2 Serge Semin 2017-04-12 1115 return ret_mws;
bf2a952d31d2cd2 Serge Semin 2017-04-12 @1116 }
bf2a952d31d2cd2 Serge Semin 2017-04-12 1117

:::::: The code at line 1116 was first introduced by commit
:::::: bf2a952d31d2cd28bb3454f15645a76fda70addd NTB: Add IDT 89HPESxNTx PCIe-switches support

:::::: TO: Serge Semin <fancer.lancer@xxxxxxxxx>
:::::: CC: Jon Mason <jdmason@xxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip