From 7600c72b75bab374ad39b2a4799a0728579a8e2f Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Mon, 9 Jun 2008 16:34:23 -0700 Subject: ocfs2: use simple_read_from_buffer() Signed-off-by: Akinobu Mita Acked-by: Joel Becker Signed-off-by: Andrew Morton Signed-off-by: Mark Fasheh --- fs/ocfs2/stack_user.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-) (limited to 'fs/ocfs2') diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c index c021280..24e0b19 100644 --- a/fs/ocfs2/stack_user.c +++ b/fs/ocfs2/stack_user.c @@ -549,26 +549,17 @@ static ssize_t ocfs2_control_read(struct file *file, size_t count, loff_t *ppos) { - char *proto_string = OCFS2_CONTROL_PROTO; - size_t to_write = 0; - - if (*ppos >= OCFS2_CONTROL_PROTO_LEN) - return 0; - - to_write = OCFS2_CONTROL_PROTO_LEN - *ppos; - if (to_write > count) - to_write = count; - if (copy_to_user(buf, proto_string + *ppos, to_write)) - return -EFAULT; + ssize_t ret; - *ppos += to_write; + ret = simple_read_from_buffer(buf, count, ppos, + OCFS2_CONTROL_PROTO, OCFS2_CONTROL_PROTO_LEN); /* Have we read the whole protocol list? */ - if (*ppos >= OCFS2_CONTROL_PROTO_LEN) + if (ret > 0 && *ppos >= OCFS2_CONTROL_PROTO_LEN) ocfs2_control_set_handshake_state(file, OCFS2_CONTROL_HANDSHAKE_READ); - return to_write; + return ret; } static int ocfs2_control_release(struct inode *inode, struct file *file) -- cgit v1.1