X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/blobdiff_plain/b34a548a5dfd2f0b068fd835a4cd51680d851068..fb2dd0f20bd6264291dccb5e97609a23cae2fd1a:/lincan/src/open.c

diff --git a/lincan/src/open.c b/lincan/src/open.c
index 015b521..deb027c 100644
--- a/lincan/src/open.c
+++ b/lincan/src/open.c
@@ -24,6 +24,7 @@ int can_open(struct inode *inode, struct file *file)
 	struct canuser_t *canuser;
 	struct canque_ends_t *qends;
 	struct canque_edge_t *edge;
+	can_spin_irqflags_t iflags;
 
 	if ( ((obj=objects_p[MINOR_NR]) == NULL) || 
 			((chip=objects_p[MINOR_NR]->hostchip) == NULL) ) {
@@ -50,7 +51,8 @@ int can_open(struct inode *inode, struct file *file)
 
 	canuser = (struct canuser_t *)kmalloc(sizeof(struct canuser_t), GFP_KERNEL);
 	if(canuser == NULL) goto no_canuser;
-	canuser->file = file;
+	canuser->flags=0;
+	canuser->userinfo.fileinfo.file = file;
 	canuser->msgobj = obj;
 	canuser->magic = CAN_USER_MAGIC;
 	file->private_data = canuser;
@@ -60,7 +62,10 @@ int can_open(struct inode *inode, struct file *file)
 	canqueue_ends_init_kern(qends);
 	canuser->qends = qends;
 	
+	/*required to synchronize with RT-Linux context*/
+	can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
 	list_add(&canuser->peers, &obj->obj_users);
+	can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
 
 	if(canqueue_connect_edge(edge=canque_new_edge_kern(MAX_BUF_LENGTH),
 		canuser->qends, obj->qends)<0) goto no_tx_qedge;