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Date: Sat, 13 Mar 2010 23:49:29 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Greg Kroah-Hartman <gregkh@...e.de>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 5/5] firmware loader: embed device into firmware_priv structure
Both these structures have the same lifetime rules so instead of allocating
and managing them separately embed struct device into struct firmware_priv.
Also make sure to delete sysfs attributes ourselves instead of expecting
sysfs to clean up our mess.
Signed-off-by: Dmitry Torokhov <dtor@...l.ru>
---
drivers/base/firmware_class.c | 251 ++++++++++++++++++++---------------------
1 files changed, 121 insertions(+), 130 deletions(-)
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 06ff016..0fbf554 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -92,21 +92,25 @@ struct firmware_priv {
int nr_pages;
int page_array_size;
struct timer_list timeout;
+ struct device dev;
char fw_id[];
};
-static void
-fw_load_abort(struct firmware_priv *fw_priv)
+static struct firmware_priv *to_firmware_priv(struct device *dev)
+{
+ return container_of(dev, struct firmware_priv, dev);
+}
+
+static void fw_load_abort(struct firmware_priv *fw_priv)
{
set_bit(FW_STATUS_ABORT, &fw_priv->status);
wmb();
complete(&fw_priv->completion);
}
-static ssize_t
-firmware_timeout_show(struct class *class,
- struct class_attribute *attr,
- char *buf)
+static ssize_t firmware_timeout_show(struct class *class,
+ struct class_attribute *attr,
+ char *buf)
{
return sprintf(buf, "%d\n", loading_timeout);
}
@@ -123,14 +127,14 @@ firmware_timeout_show(struct class *class,
*
* Note: zero means 'wait forever'.
**/
-static ssize_t
-firmware_timeout_store(struct class *class,
- struct class_attribute *attr,
- const char *buf, size_t count)
+static ssize_t firmware_timeout_store(struct class *class,
+ struct class_attribute *attr,
+ const char *buf, size_t count)
{
loading_timeout = simple_strtol(buf, NULL, 10);
if (loading_timeout < 0)
loading_timeout = 0;
+
return count;
}
@@ -142,21 +146,20 @@ static struct class_attribute firmware_class_attrs[] = {
static void fw_dev_release(struct device *dev)
{
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ struct firmware_priv *fw_priv = to_firmware_priv(dev);
int i;
for (i = 0; i < fw_priv->nr_pages; i++)
__free_page(fw_priv->pages[i]);
kfree(fw_priv->pages);
kfree(fw_priv);
- kfree(dev);
module_put(THIS_MODULE);
}
static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ struct firmware_priv *fw_priv = to_firmware_priv(dev);
if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id))
return -ENOMEM;
@@ -176,8 +179,9 @@ static struct class firmware_class = {
static ssize_t firmware_loading_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ struct firmware_priv *fw_priv = to_firmware_priv(dev);
int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status);
+
return sprintf(buf, "%d\n", loading);
}
@@ -202,7 +206,7 @@ static ssize_t firmware_loading_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ struct firmware_priv *fw_priv = to_firmware_priv(dev);
int loading = simple_strtol(buf, NULL, 10);
int i;
@@ -257,12 +261,12 @@ static ssize_t firmware_loading_store(struct device *dev,
static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store);
-static ssize_t
-firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buffer, loff_t offset, size_t count)
+static ssize_t firmware_data_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t offset, size_t count)
{
struct device *dev = to_dev(kobj);
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ struct firmware_priv *fw_priv = to_firmware_priv(dev);
struct firmware *fw;
ssize_t ret_count;
@@ -301,8 +305,7 @@ out:
return ret_count;
}
-static int
-fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
+static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
{
int pages_needed = ALIGN(min_size, PAGE_SIZE) >> PAGE_SHIFT;
@@ -351,12 +354,12 @@ fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
* Data written to the 'data' attribute will be later handed to
* the driver as a firmware image.
**/
-static ssize_t
-firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buffer, loff_t offset, size_t count)
+static ssize_t firmware_data_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buffer, loff_t offset, size_t count)
{
struct device *dev = to_dev(kobj);
- struct firmware_priv *fw_priv = dev_get_drvdata(dev);
+ struct firmware_priv *fw_priv = to_firmware_priv(dev);
struct firmware *fw;
ssize_t retval;
@@ -404,106 +407,94 @@ static struct bin_attribute firmware_attr_data = {
.write = firmware_data_write,
};
-static void
-firmware_class_timeout(u_long data)
+static void firmware_class_timeout(u_long data)
{
struct firmware_priv *fw_priv = (struct firmware_priv *) data;
+
fw_load_abort(fw_priv);
}
-static int fw_register_device(struct device **dev_p, const char *fw_name,
- struct device *device)
+static struct firmware_priv *
+fw_create_instance(struct firmware *firmware, const char *fw_name,
+ struct device *device, bool uevent)
{
- int retval;
- struct firmware_priv *fw_priv =
- kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL);
- struct device *f_dev = kzalloc(sizeof(*f_dev), GFP_KERNEL);
-
- *dev_p = NULL;
+ struct firmware_priv *fw_priv;
+ struct device *f_dev;
+ int error;
- if (!fw_priv || !f_dev) {
+ fw_priv = kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL);
+ if (!fw_priv) {
dev_err(device, "%s: kmalloc failed\n", __func__);
- retval = -ENOMEM;
- goto error_kfree;
+ error = -ENOMEM;
+ goto err_out;
}
+ fw_priv->fw = firmware;
strcpy(fw_priv->fw_id, fw_name);
init_completion(&fw_priv->completion);
+ setup_timer(&fw_priv->timeout,
+ firmware_class_timeout, (u_long) fw_priv);
- fw_priv->timeout.function = firmware_class_timeout;
- fw_priv->timeout.data = (u_long) fw_priv;
- init_timer(&fw_priv->timeout);
+ f_dev = &fw_priv->dev;
+ device_initialize(f_dev);
dev_set_name(f_dev, "%s", dev_name(device));
f_dev->parent = device;
f_dev->class = &firmware_class;
- dev_set_drvdata(f_dev, fw_priv);
- dev_set_uevent_suppress(f_dev, 1);
- retval = device_register(f_dev);
- if (retval) {
- dev_err(device, "%s: device_register failed\n", __func__);
- put_device(f_dev);
- return retval;
- }
- *dev_p = f_dev;
- return 0;
-
-error_kfree:
- kfree(f_dev);
- kfree(fw_priv);
- return retval;
-}
-
-static int fw_setup_device(struct firmware *fw, struct device **dev_p,
- const char *fw_name, struct device *device,
- int uevent)
-{
- struct device *f_dev;
- struct firmware_priv *fw_priv;
- int retval;
-
- *dev_p = NULL;
- retval = fw_register_device(&f_dev, fw_name, device);
- if (retval)
- goto out;
+ dev_set_uevent_suppress(f_dev, true);
/* Need to pin this module until class device is destroyed */
__module_get(THIS_MODULE);
- fw_priv = dev_get_drvdata(f_dev);
+ error = device_add(f_dev);
+ if (error) {
+ dev_err(device, "%s: device_register failed\n", __func__);
+ goto err_put_dev;
+ }
- fw_priv->fw = fw;
- retval = sysfs_create_bin_file(&f_dev->kobj, &firmware_attr_data);
- if (retval) {
+ error = device_create_bin_file(f_dev, &firmware_attr_data);
+ if (error) {
dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__);
- goto error_unreg;
+ goto err_del_dev;
}
- retval = device_create_file(f_dev, &dev_attr_loading);
- if (retval) {
+ error = device_create_file(f_dev, &dev_attr_loading);
+ if (error) {
dev_err(device, "%s: device_create_file failed\n", __func__);
- goto error_unreg;
+ goto err_del_bin_attr;
}
if (uevent)
- dev_set_uevent_suppress(f_dev, 0);
- *dev_p = f_dev;
- goto out;
+ dev_set_uevent_suppress(f_dev, false);
+
+ return fw_priv;
+
+err_del_bin_attr:
+ device_remove_bin_file(f_dev, &firmware_attr_data);
+err_del_dev:
+ device_del(f_dev);
+err_put_dev:
+ put_device(f_dev);
+err_out:
+ return ERR_PTR(error);
+}
-error_unreg:
+static void fw_destroy_instance(struct firmware_priv *fw_priv)
+{
+ struct device *f_dev = &fw_priv->dev;
+
+ device_remove_file(f_dev, &dev_attr_loading);
+ device_remove_bin_file(f_dev, &firmware_attr_data);
device_unregister(f_dev);
-out:
- return retval;
}
-static int
-_request_firmware(const struct firmware **firmware_p, const char *name,
- struct device *device, int uevent)
+static int _request_firmware(const struct firmware **firmware_p,
+ const char *name, struct device *device,
+ bool uevent)
{
- struct device *f_dev;
struct firmware_priv *fw_priv;
struct firmware *firmware;
- int retval;
+ int retval = 0;
if (!firmware_p)
return -EINVAL;
@@ -519,46 +510,46 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
if (fw_get_builtin_firmware(firmware, name)) {
dev_info(device,
"firmware: using built-in firmware %s\n", name);
- return 0;
+ goto out;
}
if (uevent)
dev_info(device, "firmware: requesting %s\n", name);
- retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
- if (retval)
- goto error_kfree_fw;
-
- fw_priv = dev_get_drvdata(f_dev);
+ fw_priv = fw_create_instance(firmware, name, device, uevent);
+ if (IS_ERR(fw_priv)) {
+ retval = PTR_ERR(fw_priv);
+ goto out;
+ }
if (uevent) {
- if (loading_timeout > 0) {
- fw_priv->timeout.expires = jiffies + loading_timeout * HZ;
- add_timer(&fw_priv->timeout);
- }
+ if (loading_timeout > 0)
+ mod_timer(&fw_priv->timeout,
+ round_jiffies_up(jiffies +
+ loading_timeout * HZ));
+
+ kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
+ }
+
+ wait_for_completion(&fw_priv->completion);
- kobject_uevent(&f_dev->kobj, KOBJ_ADD);
- wait_for_completion(&fw_priv->completion);
- set_bit(FW_STATUS_DONE, &fw_priv->status);
- del_timer_sync(&fw_priv->timeout);
- } else
- wait_for_completion(&fw_priv->completion);
+ set_bit(FW_STATUS_DONE, &fw_priv->status);
+ del_timer_sync(&fw_priv->timeout);
mutex_lock(&fw_lock);
- if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) {
+ if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status))
retval = -ENOENT;
- release_firmware(fw_priv->fw);
- *firmware_p = NULL;
- }
fw_priv->fw = NULL;
mutex_unlock(&fw_lock);
- device_unregister(f_dev);
- goto out;
-error_kfree_fw:
- kfree(firmware);
- *firmware_p = NULL;
+ fw_destroy_instance(fw_priv);
+
out:
+ if (retval) {
+ release_firmware(firmware);
+ firmware_p = NULL;
+ }
+
return retval;
}
@@ -610,23 +601,24 @@ struct firmware_work {
int uevent;
};
-static int
-request_firmware_work_func(void *arg)
+static int request_firmware_work_func(void *arg)
{
struct firmware_work *fw_work = arg;
const struct firmware *fw;
int ret;
+
if (!arg) {
WARN_ON(1);
return 0;
}
- ret = _request_firmware(&fw, fw_work->name, fw_work->device,
- fw_work->uevent);
+ ret = _request_firmware(&fw, fw_work->name, fw_work->device,
+ fw_work->uevent);
fw_work->cont(fw, fw_work->context);
module_put(fw_work->module);
kfree(fw_work);
+
return ret;
}
@@ -654,34 +646,33 @@ request_firmware_nowait(
void (*cont)(const struct firmware *fw, void *context))
{
struct task_struct *task;
- struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work),
- gfp);
+ struct firmware_work *fw_work;
+ fw_work = kzalloc(sizeof (struct firmware_work), gfp);
if (!fw_work)
return -ENOMEM;
+
+ fw_work->module = module;
+ fw_work->name = name;
+ fw_work->device = device;
+ fw_work->context = context;
+ fw_work->cont = cont;
+ fw_work->uevent = uevent;
+
if (!try_module_get(module)) {
kfree(fw_work);
return -EFAULT;
}
- *fw_work = (struct firmware_work) {
- .module = module,
- .name = name,
- .device = device,
- .context = context,
- .cont = cont,
- .uevent = uevent,
- };
-
task = kthread_run(request_firmware_work_func, fw_work,
"firmware/%s", name);
-
if (IS_ERR(task)) {
fw_work->cont(NULL, fw_work->context);
module_put(fw_work->module);
kfree(fw_work);
return PTR_ERR(task);
}
+
return 0;
}
--
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