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acpi: use non-racy method for proc entries creation

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Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data
be setup before gluing PDE to main tree.

Add correct ->owner to proc_fops to fix reading/module unloading race.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Denis V. Lunev
2008-04-29 01:02:27 -07:00
committed by Linus Torvalds
parent 667471386d
commit cf7acfab03
17 changed files with 162 additions and 264 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/acpi/video.c
+44 -68
View File
@@ -192,6 +192,7 @@ struct acpi_video_device {
/* bus */
static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_info_fops = {
.owner = THIS_MODULE,
.open = acpi_video_bus_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -200,6 +201,7 @@ static struct file_operations acpi_video_bus_info_fops = {
static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_ROM_fops = {
.owner = THIS_MODULE,
.open = acpi_video_bus_ROM_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -209,6 +211,7 @@ static struct file_operations acpi_video_bus_ROM_fops = {
static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
struct file *file);
static struct file_operations acpi_video_bus_POST_info_fops = {
.owner = THIS_MODULE,
.open = acpi_video_bus_POST_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -217,6 +220,7 @@ static struct file_operations acpi_video_bus_POST_info_fops = {
static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_POST_fops = {
.owner = THIS_MODULE,
.open = acpi_video_bus_POST_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -225,6 +229,7 @@ static struct file_operations acpi_video_bus_POST_fops = {
static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
static struct file_operations acpi_video_bus_DOS_fops = {
.owner = THIS_MODULE,
.open = acpi_video_bus_DOS_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -235,6 +240,7 @@ static struct file_operations acpi_video_bus_DOS_fops = {
static int acpi_video_device_info_open_fs(struct inode *inode,
struct file *file);
static struct file_operations acpi_video_device_info_fops = {
.owner = THIS_MODULE,
.open = acpi_video_device_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -244,6 +250,7 @@ static struct file_operations acpi_video_device_info_fops = {
static int acpi_video_device_state_open_fs(struct inode *inode,
struct file *file);
static struct file_operations acpi_video_device_state_fops = {
.owner = THIS_MODULE,
.open = acpi_video_device_state_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -253,6 +260,7 @@ static struct file_operations acpi_video_device_state_fops = {
static int acpi_video_device_brightness_open_fs(struct inode *inode,
struct file *file);
static struct file_operations acpi_video_device_brightness_fops = {
.owner = THIS_MODULE,
.open = acpi_video_device_brightness_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -262,6 +270,7 @@ static struct file_operations acpi_video_device_brightness_fops = {
static int acpi_video_device_EDID_open_fs(struct inode *inode,
struct file *file);
static struct file_operations acpi_video_device_EDID_fops = {
.owner = THIS_MODULE,
.open = acpi_video_device_EDID_open_fs,
.read = seq_read,
.llseek = seq_lseek,
@@ -1070,51 +1079,36 @@ static int acpi_video_device_add_fs(struct acpi_device *device)
}
/* 'info' [R] */
entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
entry = proc_create_data("info", S_IRUGO, acpi_device_dir(device),
&acpi_video_device_info_fops, acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
entry->proc_fops = &acpi_video_device_info_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'state' [R/W] */
entry =
create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
acpi_device_dir(device));
acpi_video_device_state_fops.write = acpi_video_device_write_state;
entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
acpi_device_dir(device),
&acpi_video_device_state_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
acpi_video_device_state_fops.write = acpi_video_device_write_state;
entry->proc_fops = &acpi_video_device_state_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'brightness' [R/W] */
entry =
create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
acpi_device_dir(device));
acpi_video_device_brightness_fops.write =
acpi_video_device_write_brightness;
entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
acpi_device_dir(device),
&acpi_video_device_brightness_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
entry->proc_fops = &acpi_video_device_brightness_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'EDID' [R] */
entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
entry = proc_create_data("EDID", S_IRUGO, acpi_device_dir(device),
&acpi_video_device_EDID_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
entry->proc_fops = &acpi_video_device_EDID_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
return 0;
}
@@ -1353,61 +1347,43 @@ static int acpi_video_bus_add_fs(struct acpi_device *device)
}
/* 'info' [R] */
entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
entry = proc_create_data("info", S_IRUGO, acpi_device_dir(device),
&acpi_video_bus_info_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
entry->proc_fops = &acpi_video_bus_info_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'ROM' [R] */
entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
entry = proc_create_data("ROM", S_IRUGO, acpi_device_dir(device),
&acpi_video_bus_ROM_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
entry->proc_fops = &acpi_video_bus_ROM_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'POST_info' [R] */
entry =
create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
entry = proc_create_data("POST_info", S_IRUGO, acpi_device_dir(device),
&acpi_video_bus_POST_info_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
entry->proc_fops = &acpi_video_bus_POST_info_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'POST' [R/W] */
entry =
create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
acpi_device_dir(device));
acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IRUSR,
acpi_device_dir(device),
&acpi_video_bus_POST_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
entry->proc_fops = &acpi_video_bus_POST_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
/* 'DOS' [R/W] */
entry =
create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
acpi_device_dir(device));
acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IRUSR,
acpi_device_dir(device),
&acpi_video_bus_DOS_fops,
acpi_driver_data(device));
if (!entry)
return -ENODEV;
else {
acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
entry->proc_fops = &acpi_video_bus_DOS_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
return 0;
}