/* close.c
* Linux CAN-bus device driver.
* Written by Arnaud Westenberg email:arnaud@wanadoo.nl
+ * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
+ * email:pisa@cmp.felk.cvut.cz
* This software is released under the GPL-License.
- * Version 0.7 6 Aug 2001
+ * Version lincan-0.3 17 Jun 2004
*/
-#define __NO_VERSION__
-#include <linux/module.h>
-
-#include <linux/autoconf.h>
-#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
-#define MODVERSIONS
-#endif
-
-#if defined (MODVERSIONS)
-#include <linux/modversions.h>
-#endif
-
-#include <linux/fs.h>
-
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
#include "../include/main.h"
#include "../include/close.h"
-#include "../include/i82527.h"
#include "../include/setup.h"
+#include "../include/fasync.h"
+
+#define __NO_VERSION__
+#include <linux/module.h>
int can_close(struct inode *inode, struct file *file)
{
- /* Give up message buffer memory */
- if (objects_p[MINOR_NR]->fifo->buf_tx_entry)
- del_mem_from_list(objects_p[MINOR_NR]->fifo->buf_tx_entry);
- else
- CANMSG("objects_p[MINOR_NR]->fifo->buf_tx_entry is NULL\n");
- if (objects_p[MINOR_NR]->fifo->buf_rx_entry)
- del_mem_from_list(objects_p[MINOR_NR]->fifo->buf_rx_entry);
- else
- CANMSG("objects_p[MINOR_NR]->fifo->buf_rx_entry is NULL\n");
-
-/* FIXME: what about clearing chip HW status, stopping sending messages etc? */
+ struct canuser_t *canuser = (struct canuser_t*)(file->private_data);
+ struct canque_ends_t *qends;
+ struct msgobj_t *obj;
+ can_spin_irqflags_t iflags;
- objects_p[MINOR_NR]->flags &= ~OPENED;
- MOD_DEC_USE_COUNT;
+ if(!canuser || (canuser->magic != CAN_USER_MAGIC)){
+ CANMSG("can_close: bad canuser magic\n");
+ return -ENODEV;
+ }
+
+ obj = canuser->msgobj;
+ qends = canuser->qends;
+
+ #ifdef CAN_ENABLE_KERN_FASYNC
+
+ can_fasync(-1, file, 0);
+
+ #endif /*CAN_ENABLE_KERN_FASYNC*/
+ can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
+ list_del(&canuser->peers);
+ can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
+ canuser->qends = NULL;
+ canqueue_ends_dispose_kern(qends, file->f_flags & O_SYNC);
+
+ kfree(canuser);
+
+ can_spin_lock_irqsave(&canuser_manipulation_lock, iflags);
+ if(atomic_dec_and_test(&obj->obj_used)){
+ can_msgobj_clear_fl(obj,OPENED);
+ };
+ can_spin_unlock_irqrestore(&canuser_manipulation_lock, iflags);
+
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,50))
+ MOD_DEC_USE_COUNT;
+ #endif
return 0;
}