diff options
Diffstat (limited to 'fs/sysfs/file.c')
-rw-r--r-- | fs/sysfs/file.c | 21 |
1 files changed, 5 insertions, 16 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index d673d9b5d33f..a84b734f7b29 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c | |||
@@ -241,7 +241,6 @@ sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t | |||
241 | static int sysfs_open_file(struct inode *inode, struct file *file) | 241 | static int sysfs_open_file(struct inode *inode, struct file *file) |
242 | { | 242 | { |
243 | struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata; | 243 | struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata; |
244 | struct attribute *attr = attr_sd->s_elem.attr.attr; | ||
245 | struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj; | 244 | struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj; |
246 | struct sysfs_buffer * buffer; | 245 | struct sysfs_buffer * buffer; |
247 | struct sysfs_ops * ops = NULL; | 246 | struct sysfs_ops * ops = NULL; |
@@ -251,11 +250,6 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
251 | if (!sysfs_get_active_two(attr_sd)) | 250 | if (!sysfs_get_active_two(attr_sd)) |
252 | return -ENODEV; | 251 | return -ENODEV; |
253 | 252 | ||
254 | /* Grab the module reference for this attribute */ | ||
255 | error = -ENODEV; | ||
256 | if (!try_module_get(attr->owner)) | ||
257 | goto err_sput; | ||
258 | |||
259 | /* if the kobject has no ktype, then we assume that it is a subsystem | 253 | /* if the kobject has no ktype, then we assume that it is a subsystem |
260 | * itself, and use ops for it. | 254 | * itself, and use ops for it. |
261 | */ | 255 | */ |
@@ -272,7 +266,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
272 | * or the subsystem have no operations. | 266 | * or the subsystem have no operations. |
273 | */ | 267 | */ |
274 | if (!ops) | 268 | if (!ops) |
275 | goto err_mput; | 269 | goto err_out; |
276 | 270 | ||
277 | /* File needs write support. | 271 | /* File needs write support. |
278 | * The inode's perms must say it's ok, | 272 | * The inode's perms must say it's ok, |
@@ -280,7 +274,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
280 | */ | 274 | */ |
281 | if (file->f_mode & FMODE_WRITE) { | 275 | if (file->f_mode & FMODE_WRITE) { |
282 | if (!(inode->i_mode & S_IWUGO) || !ops->store) | 276 | if (!(inode->i_mode & S_IWUGO) || !ops->store) |
283 | goto err_mput; | 277 | goto err_out; |
284 | } | 278 | } |
285 | 279 | ||
286 | /* File needs read support. | 280 | /* File needs read support. |
@@ -289,7 +283,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
289 | */ | 283 | */ |
290 | if (file->f_mode & FMODE_READ) { | 284 | if (file->f_mode & FMODE_READ) { |
291 | if (!(inode->i_mode & S_IRUGO) || !ops->show) | 285 | if (!(inode->i_mode & S_IRUGO) || !ops->show) |
292 | goto err_mput; | 286 | goto err_out; |
293 | } | 287 | } |
294 | 288 | ||
295 | /* No error? Great, allocate a buffer for the file, and store it | 289 | /* No error? Great, allocate a buffer for the file, and store it |
@@ -298,7 +292,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
298 | error = -ENOMEM; | 292 | error = -ENOMEM; |
299 | buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL); | 293 | buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL); |
300 | if (!buffer) | 294 | if (!buffer) |
301 | goto err_mput; | 295 | goto err_out; |
302 | 296 | ||
303 | init_MUTEX(&buffer->sem); | 297 | init_MUTEX(&buffer->sem); |
304 | buffer->needs_read_fill = 1; | 298 | buffer->needs_read_fill = 1; |
@@ -310,9 +304,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
310 | sysfs_get(attr_sd); | 304 | sysfs_get(attr_sd); |
311 | return 0; | 305 | return 0; |
312 | 306 | ||
313 | err_mput: | 307 | err_out: |
314 | module_put(attr->owner); | ||
315 | err_sput: | ||
316 | sysfs_put_active_two(attr_sd); | 308 | sysfs_put_active_two(attr_sd); |
317 | return error; | 309 | return error; |
318 | } | 310 | } |
@@ -320,12 +312,9 @@ static int sysfs_open_file(struct inode *inode, struct file *file) | |||
320 | static int sysfs_release(struct inode * inode, struct file * filp) | 312 | static int sysfs_release(struct inode * inode, struct file * filp) |
321 | { | 313 | { |
322 | struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata; | 314 | struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata; |
323 | struct attribute *attr = attr_sd->s_elem.attr.attr; | ||
324 | struct sysfs_buffer *buffer = filp->private_data; | 315 | struct sysfs_buffer *buffer = filp->private_data; |
325 | 316 | ||
326 | sysfs_put(attr_sd); | 317 | sysfs_put(attr_sd); |
327 | /* After this point, attr should not be accessed. */ | ||
328 | module_put(attr->owner); | ||
329 | 318 | ||
330 | if (buffer) { | 319 | if (buffer) { |
331 | if (buffer->page) | 320 | if (buffer->page) |