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Date: Wed, 21 Aug 2013 15:44:55 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Evgeniy Polyakov <zbr@...emap.net>
Subject: [PATCH 01/11] w1: add attribute groups to struct w1_family_ops
This lets w1 slave drivers declare an attribute group, and not have to
create/destroy sysfs files directly. All w1 slave drivers will be fixed
to use this field up in follow-on patches to this one.
Cc: Evgeniy Polyakov <zbr@...emap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/w1/w1.c | 73 ++++++++++++++++++++++++++++----------------------
drivers/w1/w1_family.h | 1 +
2 files changed, 42 insertions(+), 32 deletions(-)
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 52b6c2f0..22013ca2 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -124,9 +124,9 @@ ATTRIBUTE_GROUPS(w1_slave);
/* Default family */
-static ssize_t w1_default_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t rw_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf, loff_t off,
+ size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -143,9 +143,9 @@ out_up:
return count;
}
-static ssize_t w1_default_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
+static ssize_t rw_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf, loff_t off,
+ size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
@@ -155,29 +155,24 @@ static ssize_t w1_default_read(struct file *filp, struct kobject *kobj,
return count;
}
-static struct bin_attribute w1_default_attr = {
- .attr = {
- .name = "rw",
- .mode = S_IRUGO | S_IWUSR,
- },
- .size = PAGE_SIZE,
- .read = w1_default_read,
- .write = w1_default_write,
+static BIN_ATTR_RW(rw, PAGE_SIZE);
+
+static struct bin_attribute *w1_slave_bin_attrs[] = {
+ &bin_attr_rw,
+ NULL,
};
-static int w1_default_add_slave(struct w1_slave *sl)
-{
- return sysfs_create_bin_file(&sl->dev.kobj, &w1_default_attr);
-}
+static const struct attribute_group w1_slave_default_group = {
+ .bin_attrs = w1_slave_bin_attrs,
+};
-static void w1_default_remove_slave(struct w1_slave *sl)
-{
- sysfs_remove_bin_file(&sl->dev.kobj, &w1_default_attr);
-}
+static const struct attribute_group *w1_slave_default_groups[] = {
+ &w1_slave_default_group,
+ NULL,
+};
static struct w1_family_ops w1_default_fops = {
- .add_slave = w1_default_add_slave,
- .remove_slave = w1_default_remove_slave,
+ .groups = w1_slave_default_groups,
};
static struct w1_family w1_default_family = {
@@ -600,6 +595,7 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
{
struct device *dev = data;
struct w1_slave *sl;
+ struct w1_family_ops *fops;
int err;
/*
@@ -611,23 +607,36 @@ static int w1_bus_notify(struct notifier_block *nb, unsigned long action,
return 0;
sl = dev_to_w1_slave(dev);
+ fops = sl->family->fops;
switch (action) {
case BUS_NOTIFY_ADD_DEVICE:
/* if the family driver needs to initialize something... */
- if (sl->family->fops && sl->family->fops->add_slave &&
- ((err = sl->family->fops->add_slave(sl)) < 0)) {
- dev_err(&sl->dev,
- "sysfs file creation for [%s] failed. err=%d\n",
- dev_name(&sl->dev), err);
- return err;
+ if (fops->add_slave) {
+ err = fops->add_slave(sl);
+ if (err < 0) {
+ dev_err(&sl->dev,
+ "add_slave() call failed. err=%d\n",
+ err);
+ return err;
+ }
+ }
+ if (fops->groups) {
+ err = sysfs_create_groups(&sl->dev.kobj, fops->groups);
+ if (err) {
+ dev_err(&sl->dev,
+ "sysfs group creation failed. err=%d\n",
+ err);
+ return err;
+ }
}
break;
case BUS_NOTIFY_DEL_DEVICE:
- /* Remove our sysfs files */
- if (sl->family->fops && sl->family->fops->remove_slave)
+ if (fops->remove_slave)
sl->family->fops->remove_slave(sl);
+ if (fops->groups)
+ sysfs_remove_groups(&sl->dev.kobj, fops->groups);
break;
}
return 0;
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h
index 625dd08f..4ad0e81b 100644
--- a/drivers/w1/w1_family.h
+++ b/drivers/w1/w1_family.h
@@ -52,6 +52,7 @@ struct w1_family_ops
{
int (* add_slave)(struct w1_slave *);
void (* remove_slave)(struct w1_slave *);
+ const struct attribute_group **groups;
};
struct w1_family
--
1.8.3.rc0.20.gb99dd2e
--
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