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-rw-r--r--fs/sysfs/file.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 46618f81ae4..c0e117649a4 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -83,7 +83,8 @@ remove_from_collection(struct sysfs_buffer *buffer, struct inode *node)
* Allocate @buffer->page, if it hasn't been already, then call the
* kobject's show() method to fill the buffer with this attribute's
* data.
- * This is called only once, on the file's first read.
+ * This is called only once, on the file's first read unless an error
+ * is returned.
*/
static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)
{
@@ -101,12 +102,13 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
buffer->event = atomic_read(&sd->s_event);
count = ops->show(kobj,attr,buffer->page);
- buffer->needs_read_fill = 0;
BUG_ON(count > (ssize_t)PAGE_SIZE);
- if (count >= 0)
+ if (count >= 0) {
+ buffer->needs_read_fill = 0;
buffer->count = count;
- else
+ } else {
ret = count;
+ }
return ret;
}