From: Frank Mori Hess <fmhess@speakeasy.net>
Date: Fri, 17 May 2002 00:00:35 +0000 (+0000)
Subject: undid some of my wrong changes to try and get analog out working again
X-Git-Tag: r0_7_65~31
X-Git-Url: http://git.tremily.us/gitweb.cgi?a=commitdiff_plain;h=e05809d03d7f9b990aea0955e945da103be9b319;p=comedi.git

undid some of my wrong changes to try and get analog out working again
---

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index 033945f5..5d691260 100644
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -1347,8 +1347,8 @@ static ssize_t comedi_write_v22(struct file *file,const char *buf,size_t nbytes,
 
 		n=nbytes;
 
-		m = async->buf_int_ptr - async->buf_user_ptr;
-		if( m < 0 )
+		m = async->data_len + async->buf_int_count - async->buf_user_count;
+		if( async->buf_user_ptr + m > async->data_len )
 			m = async->data_len - async->buf_user_ptr;
 
 		if(m < n) n = m;