[PATCH] w1: cleanups.
- white space changes. - list_for_each_entry/list_for_each_entry_safe and reverse changes. - small coding style changes. - removed redundant NULL checks. - use attribute group and macros instead of direct device attributes. Patch is havily based on work from Adrian Bunk and Dmitry Torokhov, thanks guys. Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Evgeniy Polyakov
committed by
Greg Kroah-Hartman
Greg Kroah-Hartman
parent
85e941cc9f
commit
7785925dd8
273
drivers/w1/w1.c
273
drivers/w1/w1.c
@@ -1,8 +1,8 @@
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/*
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* w1.c
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* w1.c
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*
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* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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*
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -99,6 +99,23 @@ static ssize_t w1_default_read_bin(struct kobject *kobj, char *buf, loff_t off,
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return sprintf(buf, "No family registered.\n");
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}
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static struct device_attribute w1_slave_attribute =
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__ATTR(name, S_IRUGO, w1_default_read_name, NULL);
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static struct device_attribute w1_slave_attribute_val =
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__ATTR(value, S_IRUGO, w1_default_read_name, NULL);
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static struct bin_attribute w1_slave_bin_attribute = {
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.attr = {
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.name = "w1_slave",
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.mode = S_IRUGO,
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.owner = THIS_MODULE,
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},
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.size = W1_SLAVE_DATA_SIZE,
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.read = &w1_default_read_bin,
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};
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static struct bus_type w1_bus_type = {
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.name = "w1",
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.match = w1_master_match,
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@@ -119,34 +136,16 @@ struct device w1_device = {
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.release = &w1_master_release
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};
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static struct device_attribute w1_slave_attribute = {
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.attr = {
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.name = "name",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_default_read_name,
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};
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static struct device_attribute w1_slave_attribute_val = {
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.attr = {
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.name = "value",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_default_read_name,
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};
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static ssize_t w1_master_attribute_show_name(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct w1_master *md = container_of (dev, struct w1_master, dev);
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ssize_t count;
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if (down_interruptible (&md->mutex))
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return -EBUSY;
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count = sprintf(buf, "%s\n", md->name);
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up(&md->mutex);
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return count;
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@@ -156,12 +155,12 @@ static ssize_t w1_master_attribute_show_pointer(struct device *dev, struct devic
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{
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struct w1_master *md = container_of(dev, struct w1_master, dev);
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ssize_t count;
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if (down_interruptible(&md->mutex))
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return -EBUSY;
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count = sprintf(buf, "0x%p\n", md->bus_master);
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up(&md->mutex);
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return count;
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}
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@@ -177,12 +176,12 @@ static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, stru
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{
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struct w1_master *md = container_of(dev, struct w1_master, dev);
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ssize_t count;
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if (down_interruptible(&md->mutex))
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return -EBUSY;
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count = sprintf(buf, "%d\n", md->max_slave_count);
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up(&md->mutex);
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return count;
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}
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@@ -191,12 +190,12 @@ static ssize_t w1_master_attribute_show_attempts(struct device *dev, struct devi
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{
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struct w1_master *md = container_of(dev, struct w1_master, dev);
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ssize_t count;
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if (down_interruptible(&md->mutex))
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return -EBUSY;
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count = sprintf(buf, "%lu\n", md->attempts);
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up(&md->mutex);
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return count;
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}
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@@ -205,12 +204,12 @@ static ssize_t w1_master_attribute_show_slave_count(struct device *dev, struct d
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{
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struct w1_master *md = container_of(dev, struct w1_master, dev);
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ssize_t count;
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if (down_interruptible(&md->mutex))
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return -EBUSY;
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count = sprintf(buf, "%d\n", md->slave_count);
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up(&md->mutex);
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return count;
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}
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@@ -233,7 +232,7 @@ static ssize_t w1_master_attribute_show_slaves(struct device *dev, struct device
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list_for_each_safe(ent, n, &md->slist) {
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sl = list_entry(ent, struct w1_slave, w1_slave_entry);
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c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", sl->name);
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c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", sl->name);
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}
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}
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@@ -242,73 +241,44 @@ static ssize_t w1_master_attribute_show_slaves(struct device *dev, struct device
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return PAGE_SIZE - c;
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}
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static struct device_attribute w1_master_attribute_slaves = {
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.attr = {
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.name = "w1_master_slaves",
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.mode = S_IRUGO,
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.owner = THIS_MODULE,
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},
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.show = &w1_master_attribute_show_slaves,
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};
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static struct device_attribute w1_master_attribute_slave_count = {
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.attr = {
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.name = "w1_master_slave_count",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_master_attribute_show_slave_count,
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};
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static struct device_attribute w1_master_attribute_attempts = {
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.attr = {
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.name = "w1_master_attempts",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_master_attribute_show_attempts,
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};
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static struct device_attribute w1_master_attribute_max_slave_count = {
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.attr = {
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.name = "w1_master_max_slave_count",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_master_attribute_show_max_slave_count,
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};
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static struct device_attribute w1_master_attribute_timeout = {
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.attr = {
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.name = "w1_master_timeout",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_master_attribute_show_timeout,
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};
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static struct device_attribute w1_master_attribute_pointer = {
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.attr = {
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.name = "w1_master_pointer",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_master_attribute_show_pointer,
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};
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static struct device_attribute w1_master_attribute_name = {
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.attr = {
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.name = "w1_master_name",
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.mode = S_IRUGO,
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.owner = THIS_MODULE
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},
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.show = &w1_master_attribute_show_name,
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#define W1_MASTER_ATTR_RO(_name, _mode) \
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struct device_attribute w1_master_attribute_##_name = \
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__ATTR(w1_master_##_name, _mode, \
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w1_master_attribute_show_##_name, NULL)
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static W1_MASTER_ATTR_RO(name, S_IRUGO);
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static W1_MASTER_ATTR_RO(slaves, S_IRUGO);
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static W1_MASTER_ATTR_RO(slave_count, S_IRUGO);
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static W1_MASTER_ATTR_RO(max_slave_count, S_IRUGO);
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static W1_MASTER_ATTR_RO(attempts, S_IRUGO);
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static W1_MASTER_ATTR_RO(timeout, S_IRUGO);
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static W1_MASTER_ATTR_RO(pointer, S_IRUGO);
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static struct attribute *w1_master_default_attrs[] = {
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&w1_master_attribute_name.attr,
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&w1_master_attribute_slaves.attr,
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&w1_master_attribute_slave_count.attr,
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&w1_master_attribute_max_slave_count.attr,
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&w1_master_attribute_attempts.attr,
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&w1_master_attribute_timeout.attr,
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&w1_master_attribute_pointer.attr,
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NULL
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};
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static struct bin_attribute w1_slave_bin_attribute = {
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.attr = {
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.name = "w1_slave",
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.mode = S_IRUGO,
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.owner = THIS_MODULE,
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},
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.size = W1_SLAVE_DATA_SIZE,
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.read = &w1_default_read_bin,
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static struct attribute_group w1_master_defattr_group = {
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.attrs = w1_master_default_attrs,
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};
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int w1_create_master_attributes(struct w1_master *master)
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{
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return sysfs_create_group(&master->dev.kobj, &w1_master_defattr_group);
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}
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void w1_destroy_master_attributes(struct w1_master *master)
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{
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sysfs_remove_group(&master->dev.kobj, &w1_master_defattr_group);
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}
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static int __w1_attach_slave_device(struct w1_slave *sl)
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{
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int err;
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@@ -341,7 +311,7 @@ static int __w1_attach_slave_device(struct w1_slave *sl)
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memcpy(&sl->attr_bin, &w1_slave_bin_attribute, sizeof(sl->attr_bin));
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memcpy(&sl->attr_name, &w1_slave_attribute, sizeof(sl->attr_name));
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memcpy(&sl->attr_val, &w1_slave_attribute_val, sizeof(sl->attr_val));
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sl->attr_bin.read = sl->family->fops->rbin;
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sl->attr_name.show = sl->family->fops->rname;
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sl->attr_val.show = sl->family->fops->rval;
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@@ -445,7 +415,7 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn)
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static void w1_slave_detach(struct w1_slave *sl)
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{
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struct w1_netlink_msg msg;
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dev_info(&sl->dev, "%s: detaching %s.\n", __func__, sl->name);
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while (atomic_read(&sl->refcnt)) {
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@@ -471,8 +441,8 @@ static struct w1_master *w1_search_master(unsigned long data)
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{
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struct w1_master *dev;
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int found = 0;
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spin_lock_irq(&w1_mlock);
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spin_lock_bh(&w1_mlock);
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list_for_each_entry(dev, &w1_masters, w1_master_entry) {
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if (dev->bus_master->data == data) {
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found = 1;
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@@ -480,12 +450,12 @@ static struct w1_master *w1_search_master(unsigned long data)
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break;
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}
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}
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spin_unlock_irq(&w1_mlock);
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spin_unlock_bh(&w1_mlock);
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return (found)?dev:NULL;
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}
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void w1_slave_found(unsigned long data, u64 rn)
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static void w1_slave_found(unsigned long data, u64 rn)
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{
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int slave_count;
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struct w1_slave *sl;
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@@ -500,7 +470,7 @@ void w1_slave_found(unsigned long data, u64 rn)
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data);
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return;
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}
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tmp = (struct w1_reg_num *) &rn;
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slave_count = 0;
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@@ -513,8 +483,7 @@ void w1_slave_found(unsigned long data, u64 rn)
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sl->reg_num.crc == tmp->crc) {
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set_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags);
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break;
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}
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else if (sl->reg_num.family == tmp->family) {
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} else if (sl->reg_num.family == tmp->family) {
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family_found = 1;
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break;
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}
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@@ -528,7 +497,7 @@ void w1_slave_found(unsigned long data, u64 rn)
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rn && ((le64_to_cpu(rn) >> 56) & 0xff) == w1_calc_crc8((u8 *)&rn, 7)) {
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w1_attach_slave_device(dev, tmp);
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}
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atomic_dec(&dev->refcnt);
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}
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@@ -545,8 +514,8 @@ void w1_search(struct w1_master *dev)
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desc_bit = 64;
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while (!(id_bit && comp_bit) && !last_device
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&& count++ < dev->max_slave_count) {
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while (!(id_bit && comp_bit) && !last_device &&
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count++ < dev->max_slave_count) {
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last = rn;
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rn = 0;
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@@ -591,8 +560,7 @@ void w1_search(struct w1_master *dev)
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last_family_desc = last_zero;
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}
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}
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else
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} else
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search_bit = id_bit;
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tmp = search_bit;
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@@ -615,42 +583,15 @@ void w1_search(struct w1_master *dev)
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last_device = 1;
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desc_bit = last_zero;
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w1_slave_found(dev->bus_master->data, rn);
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}
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}
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int w1_create_master_attributes(struct w1_master *dev)
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static int w1_control(void *data)
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{
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if ( device_create_file(&dev->dev, &w1_master_attribute_slaves) < 0 ||
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device_create_file(&dev->dev, &w1_master_attribute_slave_count) < 0 ||
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device_create_file(&dev->dev, &w1_master_attribute_attempts) < 0 ||
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device_create_file(&dev->dev, &w1_master_attribute_max_slave_count) < 0 ||
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device_create_file(&dev->dev, &w1_master_attribute_timeout) < 0||
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device_create_file(&dev->dev, &w1_master_attribute_pointer) < 0||
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device_create_file(&dev->dev, &w1_master_attribute_name) < 0)
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return -EINVAL;
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return 0;
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}
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void w1_destroy_master_attributes(struct w1_master *dev)
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{
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device_remove_file(&dev->dev, &w1_master_attribute_slaves);
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device_remove_file(&dev->dev, &w1_master_attribute_slave_count);
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device_remove_file(&dev->dev, &w1_master_attribute_attempts);
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device_remove_file(&dev->dev, &w1_master_attribute_max_slave_count);
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device_remove_file(&dev->dev, &w1_master_attribute_timeout);
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device_remove_file(&dev->dev, &w1_master_attribute_pointer);
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device_remove_file(&dev->dev, &w1_master_attribute_name);
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}
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int w1_control(void *data)
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{
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struct w1_slave *sl;
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struct w1_master *dev;
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struct list_head *ent, *ment, *n, *mn;
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struct w1_slave *sl, *sln;
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struct w1_master *dev, *n;
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int err, have_to_wait = 0;
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daemonize("w1_control");
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@@ -665,9 +606,7 @@ int w1_control(void *data)
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if (signal_pending(current))
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flush_signals(current);
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list_for_each_safe(ment, mn, &w1_masters) {
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dev = list_entry(ment, struct w1_master, w1_master_entry);
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list_for_each_entry_safe(dev, n, &w1_masters, w1_master_entry) {
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if (!control_needs_exit && !dev->need_exit)
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continue;
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/*
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@@ -679,9 +618,9 @@ int w1_control(void *data)
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continue;
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}
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spin_lock(&w1_mlock);
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spin_lock_bh(&w1_mlock);
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list_del(&dev->w1_master_entry);
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spin_unlock(&w1_mlock);
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spin_unlock_bh(&w1_mlock);
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if (control_needs_exit) {
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dev->need_exit = 1;
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@@ -695,19 +634,11 @@ int w1_control(void *data)
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wait_for_completion(&dev->dev_exited);
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list_for_each_safe(ent, n, &dev->slist) {
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sl = list_entry(ent, struct w1_slave, w1_slave_entry);
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list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
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list_del(&sl->w1_slave_entry);
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if (!sl)
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dev_warn(&dev->dev,
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"%s: slave entry is NULL.\n",
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__func__);
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else {
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list_del(&sl->w1_slave_entry);
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w1_slave_detach(sl);
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kfree(sl);
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}
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w1_slave_detach(sl);
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kfree(sl);
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}
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w1_destroy_master_attributes(dev);
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atomic_dec(&dev->refcnt);
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@@ -720,8 +651,7 @@ int w1_control(void *data)
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int w1_process(void *data)
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{
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struct w1_master *dev = (struct w1_master *) data;
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struct list_head *ent, *n;
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struct w1_slave *sl;
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struct w1_slave *sl, *sln;
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daemonize("%s", dev->name);
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allow_signal(SIGTERM);
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@@ -742,27 +672,20 @@ int w1_process(void *data)
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if (down_interruptible(&dev->mutex))
|
||||
continue;
|
||||
|
||||
list_for_each_safe(ent, n, &dev->slist) {
|
||||
sl = list_entry(ent, struct w1_slave, w1_slave_entry);
|
||||
|
||||
if (sl)
|
||||
list_for_each_entry(sl, &dev->slist, w1_slave_entry)
|
||||
clear_bit(W1_SLAVE_ACTIVE, (long *)&sl->flags);
|
||||
}
|
||||
|
||||
|
||||
w1_search_devices(dev, w1_slave_found);
|
||||
|
||||
list_for_each_safe(ent, n, &dev->slist) {
|
||||
sl = list_entry(ent, struct w1_slave, w1_slave_entry);
|
||||
|
||||
if (sl && !test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags) && !--sl->ttl) {
|
||||
list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) {
|
||||
if (!test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags) && !--sl->ttl) {
|
||||
list_del (&sl->w1_slave_entry);
|
||||
|
||||
w1_slave_detach (sl);
|
||||
kfree (sl);
|
||||
|
||||
dev->slave_count--;
|
||||
}
|
||||
else if (test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags))
|
||||
} else if (test_bit(W1_SLAVE_ACTIVE, (unsigned long *)&sl->flags))
|
||||
sl->ttl = dev->slave_ttl;
|
||||
}
|
||||
up(&dev->mutex);
|
||||
@@ -774,7 +697,7 @@ int w1_process(void *data)
|
||||
return 0;
|
||||
}
|
||||
|
||||
int w1_init(void)
|
||||
static int w1_init(void)
|
||||
{
|
||||
int retval;
|
||||
|
||||
@@ -814,18 +737,14 @@ err_out_exit_init:
|
||||
return retval;
|
||||
}
|
||||
|
||||
void w1_fini(void)
|
||||
static void w1_fini(void)
|
||||
{
|
||||
struct w1_master *dev;
|
||||
struct list_head *ent, *n;
|
||||
|
||||
list_for_each_safe(ent, n, &w1_masters) {
|
||||
dev = list_entry(ent, struct w1_master, w1_master_entry);
|
||||
list_for_each_entry(dev, &w1_masters, w1_master_entry)
|
||||
__w1_remove_master_device(dev);
|
||||
}
|
||||
|
||||
control_needs_exit = 1;
|
||||
|
||||
wait_for_completion(&w1_control_complete);
|
||||
|
||||
driver_unregister(&w1_driver);
|
||||
|
||||
Reference in New Issue
Block a user