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platform/chrome: use sysfs_emit() instead of scnprintf()

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Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/202212021656040995199@zte.com.cn
[tzungbi: fixed the commit message.]
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
This commit is contained in:
ye xingchen 2022-12-02 16:56:04 +08:00 committed by Tzung-Bi Shih
parent 1b929c02af
commit 256b734efc
3 changed files with 9 additions and 12 deletions
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14
drivers/platform/chrome/cros_ec_lightbar.c
View file

@ -34,7 +34,7 @@ static ssize_t interval_msec_show(struct device *dev,
{
unsigned long msec = lb_interval_jiffies * 1000 / HZ;
return scnprintf(buf, PAGE_SIZE, "%lu\n", msec);
return sysfs_emit(buf, "%lu\n", msec);
}
static ssize_t interval_msec_store(struct device *dev,
@ -169,7 +169,7 @@ static ssize_t version_show(struct device *dev,
if (!get_lightbar_version(ec, &version, &flags))
return -EIO;
return scnprintf(buf, PAGE_SIZE, "%d %d\n", version, flags);
return sysfs_emit(buf, "%d %d\n", version, flags);
}
static ssize_t brightness_store(struct device *dev,
@ -302,17 +302,15 @@ static ssize_t sequence_show(struct device *dev,
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
ret = scnprintf(buf, PAGE_SIZE, "XFER / EC ERROR %d / %d\n",
ret, msg->result);
ret = sysfs_emit(buf, "XFER / EC ERROR %d / %d\n", ret, msg->result);
goto exit;
}
resp = (struct ec_response_lightbar *)msg->data;
if (resp->get_seq.num >= ARRAY_SIZE(seqname))
ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->get_seq.num);
ret = sysfs_emit(buf, "%d\n", resp->get_seq.num);
else
ret = scnprintf(buf, PAGE_SIZE, "%s\n",
seqname[resp->get_seq.num]);
ret = sysfs_emit(buf, "%s\n", seqname[resp->get_seq.num]);
exit:
kfree(msg);
@ -483,7 +481,7 @@ static ssize_t userspace_control_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", userspace_control);
return sysfs_emit(buf, "%d\n", userspace_control);
}
static ssize_t userspace_control_store(struct device *dev,

4
drivers/platform/chrome/cros_ec_sysfs.c
View file

@ -227,7 +227,7 @@ static ssize_t flashinfo_show(struct device *dev,
resp = (struct ec_response_flash_info *)msg->data;
ret = scnprintf(buf, PAGE_SIZE,
ret = sysfs_emit(buf,
"FlashSize %d\nWriteSize %d\n"
"EraseSize %d\nProtectSize %d\n",
resp->flash_size, resp->write_block_size,
@ -264,7 +264,7 @@ static ssize_t kb_wake_angle_show(struct device *dev,
goto exit;
resp = (struct ec_response_motion_sense *)msg->data;
ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->kb_wake_angle.ret);
ret = sysfs_emit(buf, "%d\n", resp->kb_wake_angle.ret);
exit:
kfree(msg);
return ret;

3
drivers/platform/chrome/wilco_ec/sysfs.c
View file

@ -119,8 +119,7 @@ static ssize_t get_info(struct device *dev, char *buf, enum get_ec_info_op op)
if (ret < 0)
return ret;
return scnprintf(buf, PAGE_SIZE, "%.*s\n", (int)sizeof(resp.value),
(char *)&resp.value);
return sysfs_emit(buf, "%.*s\n", (int)sizeof(resp.value), (char *)&resp.value);
}
static ssize_t version_show(struct device *dev, struct device_attribute *attr,