[PATCH v4 4/4] HID: corsair,lenovo: Convert sprintf() family to sysfs_emit() family

From: Li Zhijian
Date: Tue Mar 19 2024 - 01:46:15 EST


Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() and scnprintf() will be converted as well if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Jiri Kosina <jikos@xxxxxxxxxx>
CC: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
CC: linux-input@xxxxxxxxxxxxxxx
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
This is a part of the work "Fix coccicheck device_attr_show warnings"[1]
Split them per subsystem so that the maintainer can review it easily
[1] https://lore.kernel.org/lkml/20240116041129.3937800-1-lizhijian@xxxxxxxxxxx/
---
drivers/hid/hid-corsair.c | 4 ++--
drivers/hid/hid-lenovo.c | 23 ++++++++++-------------
2 files changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/hid/hid-corsair.c b/drivers/hid/hid-corsair.c
index 8c895c820b67..702f50e9841d 100644
--- a/drivers/hid/hid-corsair.c
+++ b/drivers/hid/hid-corsair.c
@@ -298,7 +298,7 @@ static ssize_t k90_show_macro_mode(struct device *dev,
goto out;
}

- ret = snprintf(buf, PAGE_SIZE, "%s\n", macro_mode);
+ ret = sysfs_emit(buf, "%s\n", macro_mode);
out:
kfree(data);

@@ -367,7 +367,7 @@ static ssize_t k90_show_current_profile(struct device *dev,
goto out;
}

- ret = snprintf(buf, PAGE_SIZE, "%d\n", current_profile);
+ ret = sysfs_emit(buf, "%d\n", current_profile);
out:
kfree(data);

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index f86c1ea83a03..e6b2ae68b8fb 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -555,7 +555,7 @@ static ssize_t attr_fn_lock_show(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n", data->fn_lock);
+ return sysfs_emit(buf, "%u\n", data->fn_lock);
}

static ssize_t attr_fn_lock_store(struct device *dev,
@@ -599,8 +599,7 @@ static ssize_t attr_sensitivity_show_cptkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n",
- cptkbd_data->sensitivity);
+ return sysfs_emit(buf, "%u\n", cptkbd_data->sensitivity);
}

static ssize_t attr_sensitivity_store_cptkbd(struct device *dev,
@@ -628,8 +627,8 @@ static ssize_t attr_middleclick_workaround_show_cptkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n",
- cptkbd_data->middleclick_workaround_cptkbd);
+ return sysfs_emit(buf, "%u\n",
+ cptkbd_data->middleclick_workaround_cptkbd);
}

static ssize_t attr_middleclick_workaround_store_cptkbd(struct device *dev,
@@ -809,7 +808,7 @@ static ssize_t attr_press_to_select_show_tpkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
+ return sysfs_emit(buf, "%u\n", data_pointer->press_to_select);
}

static ssize_t attr_press_to_select_store_tpkbd(struct device *dev,
@@ -839,7 +838,7 @@ static ssize_t attr_dragging_show_tpkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
+ return sysfs_emit(buf, "%u\n", data_pointer->dragging);
}

static ssize_t attr_dragging_store_tpkbd(struct device *dev,
@@ -869,7 +868,7 @@ static ssize_t attr_release_to_select_show_tpkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
+ return sysfs_emit(buf, "%u\n", data_pointer->release_to_select);
}

static ssize_t attr_release_to_select_store_tpkbd(struct device *dev,
@@ -899,7 +898,7 @@ static ssize_t attr_select_right_show_tpkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
+ return sysfs_emit(buf, "%u\n", data_pointer->select_right);
}

static ssize_t attr_select_right_store_tpkbd(struct device *dev,
@@ -929,8 +928,7 @@ static ssize_t attr_sensitivity_show_tpkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n",
- data_pointer->sensitivity);
+ return sysfs_emit(buf, "%u\n", data_pointer->sensitivity);
}

static ssize_t attr_sensitivity_store_tpkbd(struct device *dev,
@@ -958,8 +956,7 @@ static ssize_t attr_press_speed_show_tpkbd(struct device *dev,
struct hid_device *hdev = to_hid_device(dev);
struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);

- return snprintf(buf, PAGE_SIZE, "%u\n",
- data_pointer->press_speed);
+ return sysfs_emit(buf, "%u\n", data_pointer->press_speed);
}

static ssize_t attr_press_speed_store_tpkbd(struct device *dev,
--
2.29.2