diff options
Diffstat (limited to 'fs/sysfs/file.c')
| -rw-r--r-- | fs/sysfs/file.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index d0e3d849516..830f76fa098 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -301,9 +301,8 @@ static int check_perm(struct inode * inode, struct file * file) /* No error? Great, allocate a buffer for the file, and store it * it in file->private_data for easy access. */ - buffer = kmalloc(sizeof(struct sysfs_buffer),GFP_KERNEL); + buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL); if (buffer) { - memset(buffer,0,sizeof(struct sysfs_buffer)); init_MUTEX(&buffer->sem); buffer->needs_read_fill = 1; buffer->ops = ops; @@ -349,7 +348,7 @@ static int sysfs_release(struct inode * inode, struct file * filp) return 0; } -struct file_operations sysfs_file_operations = { +const struct file_operations sysfs_file_operations = { .read = sysfs_read_file, .write = sysfs_write_file, .llseek = generic_file_llseek, @@ -362,10 +361,12 @@ int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type) { struct sysfs_dirent * parent_sd = dir->d_fsdata; umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG; - int error = 0; + int error = -EEXIST; mutex_lock(&dir->d_inode->i_mutex); - error = sysfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type); + if (!sysfs_dirent_exist(parent_sd, attr->name)) + error = sysfs_make_dirent(parent_sd, NULL, (void *)attr, + mode, type); mutex_unlock(&dir->d_inode->i_mutex); return error; |