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Message-Id: <20220226133047.6226-2-zev@bewilderbeest.net>
Date: Sat, 26 Feb 2022 05:30:43 -0800
From: Zev Weiss <zev@...ilderbeest.net>
To: linux-hwmon@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>,
Jean Delvare <jdelvare@...e.com>
Cc: Zev Weiss <zev@...ilderbeest.net>, Renze Nicolai <renze@...lus.nl>,
openbmc@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] hwmon: (nct6775) Rearrange attr-group initialization
We now track the number of attribute groups in nct6775_data, as a
measure to simplify handling differences in the set of enabled
attribute groups between nct6775 drivers (platform & i2c). As a side
effect, we also reduce the amount of IS_ERR()/PTR_ERR() boilerplate a
bit.
Signed-off-by: Zev Weiss <zev@...ilderbeest.net>
---
drivers/hwmon/nct6775.c | 84 ++++++++++++++++++++---------------------
1 file changed, 42 insertions(+), 42 deletions(-)
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index 2b91f7e05126..139b2fe5ca4d 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -1198,6 +1198,7 @@ struct nct6775_data {
const char *name;
const struct attribute_group *groups[7];
+ u8 num_groups;
u16 reg_temp[5][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst,
* 3=temp_crit, 4=temp_lcrit
@@ -1405,10 +1406,18 @@ struct sensor_template_group {
int base;
};
-static struct attribute_group *
-nct6775_create_attr_group(struct device *dev,
- const struct sensor_template_group *tg,
- int repeat)
+static int nct6775_add_attr_group(struct nct6775_data *data, const struct attribute_group *group)
+{
+ /* Need to leave a NULL terminator at the end of data->groups */
+ if (WARN_ON(data->num_groups == ARRAY_SIZE(data->groups) - 1))
+ return -ENOSPC;
+
+ data->groups[data->num_groups++] = group;
+ return 0;
+}
+
+static int nct6775_add_template_attr_group(struct device *dev, struct nct6775_data *data,
+ const struct sensor_template_group *tg, int repeat)
{
struct attribute_group *group;
struct sensor_device_attr_u *su;
@@ -1419,28 +1428,28 @@ nct6775_create_attr_group(struct device *dev,
int i, count;
if (repeat <= 0)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
t = tg->templates;
for (count = 0; *t; t++, count++)
;
if (count == 0)
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
if (group == NULL)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
GFP_KERNEL);
if (attrs == NULL)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
GFP_KERNEL);
if (su == NULL)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
group->attrs = attrs;
group->is_visible = tg->is_visible;
@@ -1478,7 +1487,7 @@ nct6775_create_attr_group(struct device *dev,
}
}
- return group;
+ return nct6775_add_attr_group(data, group);
}
static bool is_word_sized(struct nct6775_data *data, u16 reg)
@@ -4020,10 +4029,8 @@ static int nct6775_probe(struct platform_device *pdev)
const u16 *reg_temp_crit_l = NULL, *reg_temp_crit_h = NULL;
int num_reg_temp, num_reg_temp_mon, num_reg_tsi_temp;
u8 cr2a;
- struct attribute_group *group;
struct device *hwmon_dev;
struct sensor_template_group tsi_temp_tg;
- int num_attr_groups = 0;
if (sio_data->access == access_direct) {
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
@@ -4844,46 +4851,39 @@ static int nct6775_probe(struct platform_device *pdev)
nct6775_init_fan_common(dev, data);
/* Register sysfs hooks */
- group = nct6775_create_attr_group(dev, &nct6775_pwm_template_group,
- data->pwm_num);
- if (IS_ERR(group))
- return PTR_ERR(group);
-
- data->groups[num_attr_groups++] = group;
-
- group = nct6775_create_attr_group(dev, &nct6775_in_template_group,
- fls(data->have_in));
- if (IS_ERR(group))
- return PTR_ERR(group);
-
- data->groups[num_attr_groups++] = group;
-
- group = nct6775_create_attr_group(dev, &nct6775_fan_template_group,
- fls(data->has_fan));
- if (IS_ERR(group))
- return PTR_ERR(group);
+ err = nct6775_add_template_attr_group(dev, data, &nct6775_pwm_template_group,
+ data->pwm_num);
+ if (err)
+ return err;
- data->groups[num_attr_groups++] = group;
+ err = nct6775_add_template_attr_group(dev, data, &nct6775_in_template_group,
+ fls(data->have_in));
+ if (err)
+ return err;
- group = nct6775_create_attr_group(dev, &nct6775_temp_template_group,
- fls(data->have_temp));
- if (IS_ERR(group))
- return PTR_ERR(group);
+ err = nct6775_add_template_attr_group(dev, data, &nct6775_fan_template_group,
+ fls(data->has_fan));
+ if (err)
+ return err;
- data->groups[num_attr_groups++] = group;
+ err = nct6775_add_template_attr_group(dev, data, &nct6775_temp_template_group,
+ fls(data->have_temp));
+ if (err)
+ return err;
if (data->have_tsi_temp) {
tsi_temp_tg.templates = nct6775_tsi_temp_template;
tsi_temp_tg.is_visible = nct6775_tsi_temp_is_visible;
tsi_temp_tg.base = fls(data->have_temp) + 1;
- group = nct6775_create_attr_group(dev, &tsi_temp_tg, fls(data->have_tsi_temp));
- if (IS_ERR(group))
- return PTR_ERR(group);
-
- data->groups[num_attr_groups++] = group;
+ err = nct6775_add_template_attr_group(dev, data, &tsi_temp_tg,
+ fls(data->have_tsi_temp));
+ if (err)
+ return err;
}
- data->groups[num_attr_groups++] = &nct6775_group_other;
+ err = nct6775_add_attr_group(data, &nct6775_group_other);
+ if (err)
+ return err;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, data->name,
data, data->groups);
--
2.35.1
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