diff options
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/dir.c | 1 | ||||
| -rw-r--r-- | fs/sysfs/file.c | 6 | ||||
| -rw-r--r-- | fs/sysfs/symlink.c | 9 |
3 files changed, 12 insertions, 4 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 4948d9bc405..a1c3a1fab7f 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -20,6 +20,7 @@ #include <linux/idr.h> #include <linux/completion.h> #include <linux/mutex.h> +#include <linux/slab.h> #include "sysfs.h" DEFINE_MUTEX(sysfs_mutex); diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index baa663e6938..ade9a7e6a75 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/kobject.h> #include <linux/kallsyms.h> +#include <linux/slab.h> #include <linux/namei.h> #include <linux/poll.h> #include <linux/list.h> @@ -128,7 +129,7 @@ sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos) ssize_t retval = 0; mutex_lock(&buffer->mutex); - if (buffer->needs_read_fill) { + if (buffer->needs_read_fill || *ppos == 0) { retval = fill_read_buffer(file->f_path.dentry,buffer); if (retval) goto out; @@ -409,8 +410,7 @@ static int sysfs_release(struct inode *inode, struct file *filp) * return POLLERR|POLLPRI, and select will return the fd whether * it is waiting for read, write, or exceptions. * Once poll/select indicates that the value has changed, you - * need to close and re-open the file, as simply seeking and reading - * again will not get new data, or reset the state of 'poll'. + * need to close and re-open the file, or seek to 0 and read again. * Reminder: this only works for attributes which actively support * it, and it is not possible to test an attribute from userspace * to see if it supports poll (Neither 'poll' nor 'select' return diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index 5f66c446615..817f5966edc 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -87,7 +87,14 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char void sysfs_remove_link(struct kobject * kobj, const char * name) { - sysfs_hash_and_remove(kobj->sd, name); + struct sysfs_dirent *parent_sd = NULL; + + if (!kobj) + parent_sd = &sysfs_root; + else + parent_sd = kobj->sd; + + sysfs_hash_and_remove(parent_sd, name); } static int sysfs_get_target_path(struct sysfs_dirent *parent_sd, |