On Fri, Dec 15, 2017 at 01:38:01AM +0800, kbuild test robot wrote:
> tree:
> https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git
> hwmon-next
> head: 99f691882e7733651625ff23f199c4086dee1f89
> commit: 99f691882e7733651625ff23f199c4086dee1f89 [20/20] hwmon: (pmbus)
> cffps: Add debugfs entries
> reproduce:
> # apt-get install sparse
> git checkout 99f691882e7733651625ff23f199c4086dee1f89
> make ARCH=x86_64 allmodconfig
> make C=1 CF=-D__CHECK_ENDIAN__
>
>
> sparse warnings: (new ones prefixed by >>)
>
>
> vim +144 drivers/hwmon/pmbus/ibm-cffps.c
>
> 116
> 117 static ssize_t ibm_cffps_debugfs_op(struct file *file, char
> __user *buf,
> 118 size_t count, loff_t *ppos)
> 119 {
> 120 u8 cmd;
> 121 int i, rc;
> 122 int *idxp = file->private_data;
> 123 int idx = *idxp;
> 124 struct ibm_cffps *psu = to_psu(idxp, idx);
> 125 char data[I2C_SMBUS_BLOCK_MAX] = { 0 };
> 126
> 127 switch (idx) {
> 128 case CFFPS_DEBUGFS_INPUT_HISTORY:
> 129 return ibm_cffps_read_input_history(psu, buf,
> count, ppos);
> 130 case CFFPS_DEBUGFS_FRU:
> 131 cmd = CFFPS_FRU_CMD;
> 132 break;
> 133 case CFFPS_DEBUGFS_PN:
> 134 cmd = CFFPS_PN_CMD;
> 135 break;
> 136 case CFFPS_DEBUGFS_SN:
> 137 cmd = CFFPS_SN_CMD;
> 138 break;
> 139 case CFFPS_DEBUGFS_CCIN:
> 140 rc = i2c_smbus_read_word_data(psu->client,
> CFFPS_CCIN_CMD);
> 141 if (rc < 0)
> 142 return rc;
> 143
> > 144 rc = snprintf(data, 5, "%04X", be16_to_cpu(rc));
I fixed that up in my tree by calling i2c_smbus_read_word_swapped() above.
No need to send a followup patch.
> 145 goto done;
> 146 case CFFPS_DEBUGFS_FW:
> 147 for (i = 0; i < CFFPS_FW_NUM_BYTES; ++i) {
> 148 rc =
> i2c_smbus_read_byte_data(psu->client,
> 149
> CFFPS_FW_CMD_START + i);
> 150 if (rc < 0)
> 151 return rc;
> 152
> 153 snprintf(&data[i * 2], 3, "%02X", rc);
> 154 }
> 155
> 156 rc = i * 2;
> 157 goto done;
> 158 default:
> 159 return -EINVAL;
> 160 }
> 161
> 162 rc = i2c_smbus_read_block_data(psu->client, cmd, data);
> 163 if (rc < 0)
> 164 return rc;
> 165
> 166 done:
> 167 data[rc] = '\n';
> 168 rc += 2;
> 169
> 170 return simple_read_from_buffer(buf, count, ppos, data,
> rc);
> 171 }
> 172
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
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